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  60 "PRESS 'ENTER' FOR THE NEXT STAGE";I$
  42 "ENTER 'Y' TO REVIEW THE QUESTIONPRESS 'ENTER' TO GO ON.  ";I$:
  22 "PRESS 'ENTER' TO SEE THE MARKINGSCHEME.  ";I$:
  14 LOAD THE NEXT TEST.":
  14 ;,,,,,"RUN THE TAPE, PRESS 'ENTER'
  14 ;"_______________________"
  14 ;"YOU ARE ALLOWED TO USE:"
  14 ;"PRESS ANY KEY TO GO ON."
  14 ;"PRESS 'ENTER'.":
  14 ;"PRESS 'ENTER' AND TRY AGAIN":
  14 ;"PAPER II REVISION TEST.";
  14 ;"P H Y S I C S"''
  14 ;"GRADE ";
  14 ;"FOR A SCORE OF ";M;"/40:":
  14 ;"1. READ THROUGH THE QUESTION       WITH GREAT CARE.":
  14 ;" VERY GOOD INDEED.";
  14 '" USE YOUR OWN DISCRETION WHEN    MARKING YOUR WORK. HOWEVER,     THE IMPORTANT POINTS THAT       SHOULD BE MADE IN YOUR ANSWER   HAVE BEEN FULLY COVERED IN      THE MARKING SCHEME."
  14 '" THE MARKING SCHEME PRESENTED    WITH EACH QUESTION IS NO MORE   THAN A GUIDE.  ANSWERS WILL     RARELY FIT IT EXACTLY."
  14 '"    ELECTRONIC CALCULATORS"'"       LOGARITHM TABLES"'"         SLIDE RULES"
  14 "YOU WILL BE INVITED TO REPEAT   THIS TEST UNTIL THE GRADE 'A'   STANDARD IS REACHED."
  14 "TO USE THIS TEST:"
  14 "PANEL 2H"
  14 "MARK YOUR WORK AS SOON AS YOU   HAVE FINISHED EACH QUESTION. USETHE MARKING SCHEME PROVIDED."
  14 "INCORRECT ASSESEMENT","PRESS 'ENTER'":
  14 "5. COMPARE YOUR ANSWER WITH THE    MARKING SCHEME PROVIDED AND     BE CRITICAL OF YOUR WORK."
  14 "4. WHEN YOU HAVE FINISHED YOUR     WORK READ THE QUESTION ONCE     MORE."
  14 "3. ALLOW YOURSELF A PERIOD ABOUT   AS LONG IN MINUTES AS THERE     ARE MARKS FOR THE QUESTION."
  14 "2. READ THE QUESTION AGAIN."
  13 PANEL 2H  O
  13 ;"ADD UP ALL YOUR MARKS AND ENTER THE TOTAL NOW:"
  13 "QUESTION 3."
  13 "QUESTION 2."
  12 ;"A WRITTEN ANSWER IS REQUIRED.":
  12 "YOU WILL NEED WRITING PAPER,    GRAPH PAPER, A RULER AND THE USEOF A CALCULATOR."
  12 "U000000000000000000000000"
  12 "T000000000000000000000000"
  12 "S032080016032112000000000"
  12 "R000000000000000000000000"
  12 "P000002124168040040040000"
  12 "O000060066066066036231000"
  12 "N000000000000000000000000"
  12 "M000000000000000000000000"
  12 "K000000000000000000000000"
  12 "J000000000000000000000000"
  12 "I000000000000000000000000"
  12 "H016016016124048008016056"
  12 "F000000000000000000000000"
  12 "E000000000000000000000000"
  12 "C096016032016096000000000"
  12  S T O P  T H E  T A P E 
  11 "Q000000000000000000000000"
  11 "L000000000000000000000000"
  11 "G016016016016084056016000"
  11 "D048072072048000000000000"
  11  COMPUTING 
  10 ));"(2 MARKS,-TOTAL 8)":
  10 ));"(2 MARKS,-TOTAL 2)":
  10 ));"(2 MARKS,-TOTAL 10)":
  10 "A000000000000000000000000"
   9 ;"      ":
   9 "QUESTION 1."
   9 "B000000000000000000000000"
   8 ));"(2 MARKS,-TOTAL 6)":
   8 ));"(2 MARKS,-TOTAL 4)":
   7 U000000000000000000000000I
   7 PANEL 2   
   7 ));"(";S;" MARKS,- TOTAL ";T;")":
   6 ;"PRESS 'ENTER' TO GET STARTED.":
   6 "PRESS 'ENTER'";I$:
   6 "PRESS 'ENTER' TO SEE THE MARKINGSCHEME.  ";I$
   6 "PRESS 'ENTER' FOR THE NEXT STAGE";I$:
   6 "PRESS 'ENTER' FOR THE MARKING   SCHEME.   ";I$:
   5 "(10 MARKS)"
   4 "PRESS 'ENTER'.  ";I$:
   4 "PRESS 'ENTER' TO START.";
   4 "(14 MARKS)";
   3 ;"(4 MARKS)"
   3 '"(12 MARKS)"
   3 "QUESTION 1." 
   3 "PRESS 'ENTER'.  ";I$
   3 "B000032040040239040040032"
   2 ;"X    X";
   2 ;"(2 MARKS)"
   2 *WB+1.3754
   2 ));"(2 MARKS,-TOTAL 12)":
   2 '"(16 MARKS)"
   2 '"(14 MARKS)"
   2 '"(10 MARKS)"
   2 "YOU WOULD BE EXPECTED TO:"
   2 "WORKED EXAMPLE:":
   2 "PRESS 'ENTER' TO GO ON.  ";I$
   2 "PRESS 'ENTER' TO GET STARTED.";
   2 "(14 MARKS)"
   2 "(13 MARKS)"
   2 " PRESS 'ENTER' TO GET STARTED.";
   2  S T O P  T H E  T A P E  
   1 r AS THEVERTICAL AXIS."
   1 r   .63 .57 .50 .42 .34 .23"
   1 kgOF WATER IN THE CONTAINER A RISEOF 6.8 K/min WAS OBSERVED AND A RISE OF 13.4 K/min WHEN 1 kg OF ACETONE WAS USED INSTEAD. ";
   1 i AS THEHORIZONTAL AXIS AND 
   1 i   .94 .87 .77 .64 .50 .34 
   1 e.m.f. OF THE CELL USING THE    EQUATION:"
   1 WITH   BOILING POINTS OF 53
   1 VOLUME OF SPACE PER 100 cm
   1 VALUES OF 'R' AS THE HORIZONTAL AXIS.  DRAW THE BEST STRAIGHT   LINE THROUGH THE POINTS."
   1 U000000000000000000000000a
   1 U000000000000000000000000
   1 THEN QUICKLY TRANSFERRED TO THE CALORIMETER WHERE THE RISE  IN TEMPERATURE IT PRODUCES IS   USED TO CALCULATE THE SPECIFIC  THERMAL CAPACITY OF THE COPPER. (2 MARKS)"
   1 THE HEAT CONDUCTED THROUGH THE INSULATION TO THE   OUTSIDE (3 MARKS)."
   1 PHYSICS 9 
   1 PHYSICS 17
   1 PHYSICS 16
   1 PHYSICS 11w&
   1 PHYSICS 10
   1 PHYSICS 1 v
   1 PHYISCS 22
   1 PHYISCS 218*
   1 PHYISCS 20y(
   1 PHYISCS 19
   1 PHYISCS 18V.
   1 PHYISCS 15
   1 PHYISCS 14
   1 PHYISCS 13z$
   1 PHYISCS 12y#
   1 PANEL 2H  M
   1 PANEL 2   }
   1 PANEL 2   w
   1 PANEL 2   l
   1 PANEL 2   \
   1 PANEL 2   Q
   1 PANEL 2   .
   1 PANEL 2   !
   1 Dm=(RAT*.1938
   1 DIAMETER, d (m), IS:"
   1 Created with Ramsoft MakeTZX
   1 C096016032016096000000000b
   1 C.","(1 MARK)"
   1 C."'"WITH 100 g OF DIBENZYL IN A TESTTUBE, A STOPCLOCK, BOILING WATERIN A BEAKER AND A THERMOMETER,  DESCRIBE HOW YOU WOULD PLOT A   COOLING CURVE AND DEDUCE FROM ITTHE m.pt. OF DIBENZYL."
   1 C."'"(16 MARKS)"
   1 C. AT    EACH TEMPERATURE THE RESISTANCE OF THE THERMISTOR IS MEASURED   USING A CIRCUIT SUCH AS:"
   1 C. (2 MARKS)"
   1 C.  (2 MARKS)"
   1 C.   (2 MARKS)"
   1 C,"'"ARE FIXED TO THE"'"OTHER ENDS OF THE"'"RODS."
   1 C, READING TO 0.1
   1 C).","   (2 MARKS)"
   1 C) FROM THAT    OF THE MIXTURE (t
   1 C"'"AND THE DENSITY OF WATER AT THATTEMPERATURE IS 998.2";U$;"."
   1 C WITH"'"RUBBER BUNGS AS"'"SET OUT IN THE"'"DIAGRAM:"
   1 C WITH    ADDITIONAL HEATING. (1 MARK)"
   1 C USING A STANDARD MERCURY  IN GLASS THERMOMETER, A BEAKER  WITH ICE, ANOTHER WITH BOILING  WATER AND NECESSARY ELECTRICAL  EQUIPMENT."
   1 C RESPECTIVELY."
   1 C OVER A PERIOD OF TIME.  THE ICE REMAINING AFTER EACH HEATINGPERIOD WAS DRIED WITH A CLOTH   AND WEIGHED. THE RESULTS WERE:"
   1 C MARK WOULD  REQUIRE THE USE OF PURE MELTING ICE.  PLACING THE THERMOMETER INTHE ICE/WATER MIXTURE (2 MARKS) TO THE LEVEL OF THE MERCURY IN  THE GLASS (1 MARK) WILL LOCATE  THE POSITION OF THE THREAD FOR  0
   1 C MARK SHOULD BE FIXED  IN A SIMILAR MANNER, IMMERSING  THE THERMOMETER IN PURE BOILING WATER (3 MARKS) AT A PRESSURE OF1 ATMOSPHERE (760 mm Hg).       (1 MARK)"
   1 C BY TYING IT WITH THE   FINE WIRE AND LEAVING IT IN THE BOILING WATER FOR A FEW MINUTES.(2 MARKS)"
   1 C AND KEPT AT 100
   1 C AND AT EACH STAGE THE NEW  STEADY READING OF THE POINTER   RECORDED.  (3 MATKS)"
   1 C    OVER THE RANGE 0
   1 B000000000000000000000000
   1 ATHERMOMETER READING TO 0.1
   1 AND A SUITABLE BALANCE."
   1 A SENSITIVE BALANCE CAPABLE OF  WEIGHING THEM ONLY INDIVIDUALLY."
   1 A QUANTITY IF ACCURATE1 
   1 A GUN WITH BLANK CARTRIGES."
   1 ;"p*v = k = GRADIENT"
   1 ;"e.m.f. = ";
   1 ;"WILL SHOW THAT THE";
   1 ;"WHERE: d = THE DIAMETER (m)"'"       M = THE MASS (kg)"'"       D = THE DENSITY (kg/m
   1 ;"WAVELENGTH OF THE SOUND";
   1 ;"WAVE.(2 MARKS)"
   1 ;"USING THE CIRCUIT SHOWN ABOVE, ASTUDENT OBTAINED THE FOLLOWING  VALUES OF THE CURRENT FOR THE   SET VALUES OF THE RESISTANCE 'R'"
   1 ;"THESE VALUES FOR k SCORE MARKS:"
   1 ;"THEIR POSITIONS";
   1 ;"THE VELOCITY,v
   1 ;"THE TURNING MOMENTS ARE:"
   1 ;"THE TUBE IS CLAMPED TO THE BASE AT 'A'. THE OTHER END RESTS ON AROLLER ATTACHED TO A POINTER ANDSCALE SO AS TO PROVIDE A 10-FOLDMAGNIFICATION OF CHANGES IN THE LENGTH 'l'."
   1 ;"THE INITIAL VALUE"'"OF R SHOULD BE"'"1 
   1 ;"THE COMBINED VALUE IS 2.5 
   1 ;"SUCTION IS APPLIED"'"AT 'S' AND THE TWO"'"LIQUIDS ARE DRAWN UP"'"THEIR RESPECTIVE"'"TUBES. (2 MARKS)"
   1 ;"SUCCESSIVE DIFFERENCES";
   1 ;"SLOPE=.94/7";
   1 ;"SLOPE = 3/5"
   1 ;"SLOPE = 24.3/1000"
   1 ;"SLOPE = 2.5/50";
   1 ;"SLOPE = 2.5/0.5"
   1 ;"SLOPE = 11.5/10";
   1 ;"SLOPE = 10/5"
   1 ;"SLOPE = 10.7/50"
   1 ;"SLOPE = .67/1.00"
   1 ;"PRESS 'ENTER' FOR THE NEXT STAGE"
   1 ;"PIN AND THE OBJECT";
   1 ;"PARALLAX IS ZERO.";
   1 ;"PAPER II REVISION" 
   1 ;"MOVING THE EYE";
   1 ;"MOVE TOGETHER WHEN";
   1 ;"MELTING TIME, t, = 556 s"
   1 ;"MARKS",,,
   1 ;"MARKS FOR THE RESISTANCE VALUE  ARE AS FOLLOWS:"
   1 ;"IN RESONANT LEVEL (h)";
   1 ;"H O M E S T U D Y"
   1 ;"GRADIENT = 1.02/5"
   1 ;"G.C.E.  'O' LEVEL PHYSICS"
   1 ;"FROM THE WAVE EQUATION:";
   1 ;"FROM SIDE TO SIDE";
   1 ;"FOCAL LENGTH = 1/.95 m"
   1 ;"ELASTIC LIMIT";
   1 ;"CORRESPOND TO HALF A";
   1 ;"COINCIDE, i.e.";
   1 ;"CALCULATE THE VELOCITY RATIO FORTHE SYSTEM ASSUMING THE EFFORT  IS APPLIED AT F."
   1 ;"ADD UP YOUR MARKS AND ENTER THE TOTAL HERE:"
   1 ;"ACTIVITY";
   1 ;"A.E.B. SYLLABUS  052."
   1 ;"= 7.2 N"
   1 ;"= 2 min";
   1 ;"= 1.15 cm/N"
   1 ;"= 0.9 kpps"
   1 ;"= 0.134":
   1 ;"7.65 V  14 MARKS";
   1 ;"7.55 V  15 MARKS";
   1 ;"7.45 V  16 MARKS";
   1 ;"7.35 V  15 MARKS";
   1 ;"7.25 V  14 MARKS";
   1 ;"7.15 V  13 MARKS";
   1 ;"7,75 V  13 MARKS"
   1 ;"4*l   T"
   1 ;"1000 N";
   1 ;"(5 MARKS)"
   1 ;"(3 MARKS)"
   1 ;"(2 MARKS: TOTAL 8)"
   1 ;"(2 MARKS: TOTAL 6)"
   1 ;"(2 MARKS: TOTAL 4)"
   1 ;"(2 MARKS: TOTAL 2)"
   1 ;"(2 MARKS: TOTAL 10)"
   1 ;"(2 MARKS,-TOTAL 8)":
   1 ;"(2 MARKS,-TOTAL 6)":
   1 ;"(2 MARKS,-TOTAL 4)":
   1 ;"(2 MARKS,-TOTAL 2)":
   1 ;"(2 MARKS,-TOTAL 12)":
   1 ;"(2 MARKS,-TOTAL 10)":
   1 ;"(10 MARKS)"
   1 ;" YOU SHOULD FIND THIS SECOND     PROGRAM MUCH EASIER TO WORK     NOW YOU KNOW WHAT TO EXPECT."
   1 ;" YOU PROBABLY REALISE BY NOW     HOW IMPORTANT IT IS TO MAKE A   WRITTEN REPLY TO THE QUESTIONS  BEFORE CONSULTING THE MARKING   SCHEME."''" TOO MUCH EMPHASIS CANNOT BE     PLACED ON THIS."''" IT IS VITALLY IMPORTANT FOR A   SUCCESSFUL REVISION."
   1 ;" YOU MAY THINK THAT YOU ARE BY   NOW SUFFICIENTLY WELL PREPARED  TO TAKE A PAPER 2 EXAMINATION."''" THIS IS NOT SO!"
   1 ;" THE NEXT THREE PROGRAMS SHOULD  ENABLE YOU TO GAIN A GRADE C    STANDARD WITH CONFIDENCE."
   1 ;" THE BENEFIT FROM THIS PROGRAM   WILL BE LOST TO YOU UNLESS YOU  HAVE THE PATIENCE TO MAKE A     WRITTEN REPLY, HOWEVER POOR     AND THEN COMPARE IT WITH THE    MARKING SCHEME."
   1 ;" PAY PARTICULAR ATTENTION TO     GRAPH DRAWING IN ALL THE NEXT   PROGRAMS. NOTICE ESPECIALLY     HOW IMPORTANT IT IS TO MARK     THE AXIS CORRECTLY. THIS DOES   NEED A LOT OF THOUGHT."
   1 ;" IN THIS PROGRAM CONCENTRATE ON  DRAWING A GOOD GRAPH MARKING    EACH AXIS CLEARLY AND STATING   WHAT EACH ONE IS USED FOR."
   1 ;" IN THIS FINAL PROGRAM YOU CAN   EXPECT TO GET AN EXCELLENT      GRADE AT THE FIRST ATTEMPT."
   1 ;" IN THE REMAINING PROGRAMS MAKE  A POINT OF READING YOUR ANSWER  AND THEN READ THE QUESTION      OVER AGAIN."
   1 ;" AT THIS STAGE YOU SHOULD FIND   ANSWERING THE QUESTIONS IN THE  PROGRAMS A MUCH EASIER TASK.    THE GREATER MASTERY YOU HAVE    OF THIS TYPE OF QUESTION THE    VERY MUCH EASIER THEY APPEAR    TO BECOME!"
   1 ;" AT THIS STAGE YOU SHOULD BE     GETTING CONSISTENTLY GOOD       GRADES IN THESE PROGRAMS AT     THE FIRST TRY."''" IT IS WORTH LOOKING BACK TO     YOUR FIRST EFFORTS TO NOTICE    THE IMPROVEMENT."
   1 ;" APPROACH THIS PROGRAM WITH THE  FULL INTENTION OF GETTING ALL   THE QUESTIONS RIGHT."
   1 ;" ALL THESE REVISION PROGRAMS     ARE CLOSELY BASED ON A.E.B.     PAPERS SET IN THE PAST TWO      YEARS. YOU CAN CONFIDENTLY      EXPECT A SIMILAR PATTERN OF     QUESTIONS TO BE SET FOR YOUR    EXAMINATION."
   1 ;" ALL THE QUESTIONS SET IN THESE  PROGRAMS HAVE BEEN DRAWN FROM   ACTUAL LABORATORY EXPERIMENTS   AND IT WOULD BE OF GREAT VALUE  TO YOU TO CARRY THEM OUT FOR    YOURSELF."
   1 ;"  v = f * (2*h).";
   1 ;"   v = f * 
   1 9.90         2"'"  10.00
   1 9.60         1"'"   9.70
   1 84.0    1"
   1 83.4    2"'"    83.5
   1 83.0    3"'"    83.1
   1 82.6    4"'"    82.7
   1 81.7    3"'"    81.8
   1 81.3    2"'"    81.4
   1 80.9    1"'"    81.0
   1 350          1"
   1 345          2"'"    346
   1 340          3"'"    341
   1 336          4"'"    337
   1 329          3"'"    330
   1 325          2"'"    326
   1 320          1"'"    321
   1 10.5   2"'"    10.6
   1 10.30        1"
   1 10.2   3"'"    10.3
   1 1.53        1"'"   1.52
   1 1.48        2"'"   1.47
   1 1.45        1"
   1 1.20         1"
   1 1.12         1"'"   1.11
   1 1.10         2"'"   1.09
   1 1.09         2"'"   1.10
   1 1.07         3"'"   1.06
   1 1.04         4"'"   1.03
   1 1.02         3"'"   1.01
   1 000000000112136136136112"
   1 000000000028226226226156"
   1 0.99         2"'"   0.98
   1 0.99         1"'"   1.00
   1 0.95         1"
   1 0.054        1"
   1 0.051        2"'"  0.052
   1 0.048        1"'"  0.049
   1 ,MUST BE QUOTED IN THE ANSWER TO SCORE ANY MARKS AT ALL."
   1 , SOME PAPER TO DRY WITH, A BEAKER AND A SUPPLY OF WATER."
   1 , OF    RESISTANCE MUST BE STATED FOR   THE ANSWER TO EARN ANY MARKS."
   1 , LENGTH OF WIRE, l (m),  TENSION, T (N), WIRE DENSITY,D  (kg/m
   1 *WB;"+1.3754=";.002245
   1 *N;"0.";N+1
   1 *D"'"        SLOPE ="'," 4*l   T" 
   1 );" (2 MARKS)";
   1 ): 2.53 2.20 2.02 1.70 1.55 1/P  : 1.00 0.90 0.80 0.70 0.60"
   1 ));"(4 MARKS,-TOTAL 9)":
   1 ));"(4 MARKS,-TOTAL 6)":
   1 ));"(4 MARKS,-TOTAL 4)":
   1 ));"(3 MARKS,-TOTAL 5)":
   1 ));"(3 MARKS,-TOTAL 12)":
   1 ));"(2 MARKS,-TOTAL 14)":
   1 ));"(2 MARKS,-TOTAL )":
   1 ));"(";S;" MARKS,- TOTAL ";T;")";:
   1 ) AS  THE HORIZONTAL AXIS AND 1/I AS  THE VERTICAL AXIS."
   1 ) = 1/(SLOPE)"
   1 )  MARKS"''"     8.6
   1 )  = 1    2    3    4    5":
   1 )    70  60  50  40  30  20 r (
   1 )    6/(R+0.5)"
   1 )    39  35  30  25  20  13 
   1 )    1.5 2.0 2.5 3.0 3.5 4.0I (A)    2.1 1.6 1.4 1.3 1.1 1.01/I      .47 .62 .70 .77 .93 1.0"
   1 )    .20 .41 .62 .82 1.02" 
   1 )     R+0.5(
   1 )       MARKS"''"  0.75 
   1 )        MARKS"''"   9.40
   1 (2 MARKS).";
   1 '''''''"IT IS ASSUMED THAT THERE IS NO  HEAT LOST, SO THE HEAT GIVEN BY THE COPPER BLOCK MUST EQUAL THE HEAT THE CALORIMETER RECEIVED:"
   1 '''''"THE HEAT GIVEN BY THE COPPER    BLOCK TO THE CALORIMETER IS:"''"     (100-t2)*Mc*c"
   1 '''"THIS PROCESS IS REPEATED UNTIL  THE CYLINDER IS FULL.  THE WHOLEPROCEDURE IS REPEATED AT LEAST  FIVE TIMES STARTING WITH AN     EMPTY CYLINDER.(2 MARKS)"
   1 '''"BOTH ANSWERS MUST QUOTE CORRECT UNITS TO SCORE ANY MARKS AT ALL"
   1 ''"TRAPPED AIR IN THE SAND WILL    GIVE A LOW VALUE FOR THE DENSITYAND IT SHOULD BE REMOVED BY A   BRISK ROTATION OF THE CYLINDER  HELD BETWEEN THE HANDS."'"(2 MARKS)"
   1 ''"THE FOLLOWING VALUES FOR THE    LENGTH SCORE THE MARKS SHOWN:"
   1 ''"THE CONTENTS OF THE CALORIMETER SHOULD BE ALLOWED TO REACH A    STEADY TEMPERATURE WHICH IS THENRECORDED AS t1.  (1 MARK)"
   1 ''"(12 MARKS)"
   1 ''" THIS IS ABSOLUTELY IN YOUR OWN  INTERESTS."
   1 ''" SHOULD YOUR APPROACH BE VERY    DIFFERENT TO THAT GIVEN IN      THE MARKING SCHEME REMEMBER     THAT THE ANSWERS GIVEN HERE     WILL ALWAYS SCORE HIGH MARKS    AND ARE A GOOD STANDARD TO      ADOPT."
   1 ''" REMEMBER THAT THE ABILITY TO    DRAW VERY GOOD GRAPHS IS A      MUST FOR THIS EXAMINATION."
   1 ''" PAPER 2 EXAMINATION QUESTIONS   ARE VERY VARIED AND AIMED AT    TESTING YOUR ABILITY TO APPLY   A GRAPH OR A FORMULA TO A SET   OF EXPERIMENTAL RESULTS AND TO  DESCRIBE EXPERIMENTAL METHODS.  THIS ALWAYS NEEDS PRACTICE."
   1 ''" NEVERTHELESS YOU SHOULD ALWAYS  BE PREPARED FOR THE UNEXPECTED  SUBJECT TO APPEAR. TAKE EXTRA   CARE WITH QUESTIONS THAT SEEM   EASY."
   1 ''" MOST CANDIDATES ARE WEAK IN     DRAWING GOOD GRAPHS. THIS HAS   BEEN GIVEN SPECIAL EMPHASIS     THROUGHOUT THESE PROGRAMS."
   1 ''" HAVING COMPLETED ALL THESE      REVISION PROGRAMS YOU SHOULD    STILL EXPECT TO BE PRESENTED    WITH AN UNUSUAL KIND OF         QUESTION IN YOUR EXAMINATION."''" BE PREPARED FOR THIS BUT ALSO   BE SURE THAT YOU ARE NOW WELL   EQUIPPED TO DEAL WITH THESE     QUESTIONS WHATEVER THEY MAY     BE ABOUT."
   1 ''" HAVE PATIENCE WITH YOURSELF.    MAKE A WRITTEN ANSWER BEFORE    YOU CONSULT THE MARKING SCHEME  FOR EACH QUESTION. WHEN YOU     WORK IN THAT WAY YOU MAKE BY    FAR THE FASTEST PROGRESS."
   1 ''" DO THIS BEFORE CONSULTING THE   MARKING SCHEME."
   1 ''" BEAR IN MIND THAT THIS PART OF  THE A.E.B. EXAMINATION CARRIES  20% OF THE TOTAL MARKS FOR THE  WHOLE EXAMINATION AND YOU NEED  EACH AND EVERY ONE OF THEM."
   1 ''"    GRADIENT          MARK"'"  0.046
   1 '"u (m)   5.0  1.4  1.1  1.0      v (m)   1.0  2.0  4.0  5.0      1/u     .20  .70  .95  1.0      1/v     1.0  .50  .25  .20"
   1 '"t (ms)     452 639 782 904 1010 h (m)       1   2   3   4    5  t
   1 '"kpps       3  2.1  1.1  .75  .38TIME(min)  0   1    3    4    5"
   1 '"YOU ARE PROVIDED WITH TWO METAL RODS, ONE GOLD AND THE OTHER    COPPER, FIXED TO A WATER BATH AT100
   1 '"YOU ARE PROVIDED WITH OVER 10000MARBLES OF NEARY EQUAL SIZE 
   1 '"YOU ARE PROVIDED WITH A STONE OFIRREGULAR SHAPE, A BEAKER LARGE ENOUGH TO HOLD THE STONE INSIDE IT, LIQUID OF DENSITY 1324 kg/m
   1 '"YOU ARE GIVEN AN UNCALIBRATED   MERCURY IN GLASS THERMOMETER    INTENDED FOR THE TEMPERATURE    RANGE -10
   1 '"WITH kpps AS THE VERTICAL AXIS  AND TIME AS THE HORIZONTAL AXIS,PLOT THE DATA GIVEN AND DRAW A  SMOOTH GRAPH THROUGH THE POINTS."
   1 '"WITH TIME AS THE HORIZONTAL AXISADN THE MASS OF ICE REMAINING ASTHE VERTICAL AXIS, PLOT THE DATAGIVEN ABOVE."
   1 '"WITH THE LOAD AS THE HORIZONTAL AXIS AND EFFORT AS THE VERTICAL AXIS PLOT THE DATA GIVEN ABOVE."
   1 '"WITH  LENGTH AS THE HORIZONTAL  AXIS AND PERIOD AS THE VERTICAL AXIS PLOT THE ABOVE DATA. DRAW  THE BEST STRAIGHT LINE THROUGH  THE  POINTS.":
   1 '"WHERE W=HEATING COIL WATTAGE          T=HEATING PERIOD (SECONDS)(2 MARKS)"
   1 '"WHERE THE CURRENT, I, FLOWING   THROUGH THE THERMISTOR, T, IS   MEASURED BY THE AMMETER, A.     (2 MARKS)"
   1 '"WHEN ALL IS READY THE WATER BATHIS QUICKLY FILLED WITH WATER AT 100
   1 '"WHEN ALL IS READY THE BLOCK IS  LIFTED FROM THE BOILING WATER,  BOUNCED ON THE BENCH TO SHAKE   OFF ADHEREING WATER AND PLUNGED INTO THE CALORIMETER. (2 MARKS)"
   1 '"VARIOUS LENGTHS OF A PENDULUM   GAVE THE FOLLOWING TIMES FOR ONECOMPLETE OSCILLATION (A PERIOD):"
   1 '"VALUES FOR THE LATENT HEAT OF   FUSION OF ICE SCORE AS FOLLOWS:"
   1 '"VALUES FOR THE FOCAL LENGTH OF  THE LENS SCORE AS FOLLOWS:"
   1 '"VALUES FOR 'g' SCORE AS FOLLOWS:"
   1 '"USING THE EQUIPMENT"'"SHOWN STATE HOW YOU"'"WOULD MEASURE THE"'"DENSITY OF THE"'"LIQUID IN 'X'"'"GIVEN THE DENSITY"'"OF THE LIQUID"'"IN 'H'."
   1 '"USING AN ACCURATE MILLISECOND   TIMER THE TIME, t (ms), OF FREE FALL OF A SMALL LEAD BALL WAS   RECORDED FOR VARIOUS HEIGHTS OF FALL, h (m):"
   1 '"TO WORK OUT THE AVERAGE DIAMETERTHE MEAN MASS, M, IS DIVIDED BY THE DENSITY AND THE RESULT IS   DIVIDED BY THE VALUE OF 
   1 '"TO COMPENSATE FOR THIS LOSS OF  HEAT, THE LIQUID, IN THE PLASTICBOTTLE, IS COOLED WELL BELOW THEAMBIENT TEMPERTURE USING COLD   WATER.  (2 MARKS)"
   1 '"THIS METHOD HAS THE ADVANTAGE OFENABLING REPEATED MEASUREMENTS  TO BE MADE QUICKLY AND EASILY.  FROM A NUMBER OF MEASURED RATIOSOF THE TWO HEIGHTS (5 AT LEAST) AN ACCURATE  ESTIMATE OF THE    UNKNOWN DENSITY CAN BE MADE.    (3 MARKS)"
   1 '"THIS GIVES RISE TO TWO SERIOUS  LIMITATIONS OF THE METHOD:"
   1 '"THIS EQUATION GIVES:"
   1 '"THIS ENSURES THAT ABOUT AS MUCH HEAT IS TAKEN IN FROM THE AIR   DURING THE 'COLD' PERIOD AS IS  LOST DURING THE 'WARM' PERIOD.  (2 MARKS)"
   1 '"THERMAL EXPERIMENTS ARE SUBJECT TO SERIOUS HEAT LOSSES TO THE   SURROUNDING AIR DURING THE TIME THE TEMPERATURE IS RISING.      (2 MARKS)"
   1 '"THE e.m.f. IS APPLIED TO THE    AMMETER WITH A RESISTANCE, R, INSERIES AS SHOWN IN THE DIAGRAM: (3 MARKS)"
   1 '"THE WATER IN THE CALORIMETER IS STIRRED AND THE TEMPERATURE READFREQUENTLY SO AS TO FIND THE    MAXIMUM TEMPERATURE RISE, t2,   PRODUCED BY THE COPPER BLOCK.   (3 MARKS)"
   1 '"THE VOLUME OF THE PLASTICINE IS THEN MEASURED BY FILLING THE    CYLINDER TO A SUITABLE LEVEL    WITH WATER AND NOTING THE RISE  IN VOLUME WHEN THE PLASTICINE ISIMMERSED IN IT. (3 MARKS)"
   1 '"THE VELOCITY OF SOUND CAN BE    WORKED OUT FROM:"
   1 '"THE VALUE OF THE MEAN DIAMETER  SHOULD NOT BE QUOTED TO TOO MANYDECIMAL PLACES; IT IS UNLIKELY  THAT AN ANSWER BETTER THAN THREESIGNIFICANT FIGURES COULD BE    OBTAINED."'"(2 MARKS)"
   1 '"THE UNITS OF ACCELERATION, m/s
   1 '"THE THERMISTOR AND THERMOMETER, WITH THE CERAMIC BEAD CLOSE TO  THE MERCURY BULB, ARE BOTH PUT  IN WATER AT VARIOUS TEMPERATURESRANGING FROM 0
   1 '"THE TEST TUBE WITH DIBENZYL IS  PLACED IN THE BOILING WATER  TO MELT IT. (2 MARKS)"
   1 '"THE TEMPERATURE OF THE DIBENZYL SHOULD BE TAKEN REGULARLY AND   RECORDED AGAINST TIME. 2(MARKS)"
   1 '"THE SPECIFIC THERMAL CAPACITY OFWATER IS 4180 J/kgK."
   1 '"THE SPECIFIC THERMAL CAPACITY OFTHE LIQUID IS GIVEN BY:"
   1 '"THE SLOPE OF THE LINE SHOULD BE MEASURED AND FOUND TO FIT THE   EQUATION:"
   1 '"THE RODS SHOULD BE OF EQUAL SIZEAND THE EXPOSED LENGTHS SHOULD  ALSO BE THE SAME.  THEY SHOULD  BE AT THE SAME TEMPERATURE AT   THE START. (2 MARKS)"
   1 '"THE RESULTS SHOWN IN THE TABLE  WERE OBTAINED FROM A STUDY OF   THE INTERNAL RESISTANCE OF A NEWCELL.  THE FOLLOWING CIRCUIT WASUSED:"
   1 '"THE RESISTANCE IS FOUND FROM THERATIO:"''"     R = 1.5/I"'"(2 MARKS)"
   1 '"THE REQUIRED EXPANSIVITY VALUE  IS OBTAINED BY DIVIDING THE RATEBY THE ORIGINAL LENGTH AT 0
   1 '"THE REFRACTIVE CONSTANT"'"OF ACRYLIC PLASTIC"'"WAS MEASURED USING A"'"SEMI-CIRCULAR SLAB"'"OF THE MATERIAL. THE"'"REFRACTED RAY ANGLE"'"WAS RECORDED FOR"'"VARIOUS ANGLES OF"'"THE INCIDENT RAY:"
   1 '"THE POSITION OF THE TOP OF THE  MERCURY THREAD SHOULD BE MARKED USING AN INDELIBLE MARKER, CARE BEING TAKEN TO AVOID PARALLAX   ERRORS. (1 MARK)"
   1 '"THE POINTER SHOULD BE SET TO THEMINIMUM READING AT THIS POINT.  THEN THE TEMPERATURE SHOULD BE  RAISED BY FIXED INTERVALS, SAY  10
   1 '"THE PLASTICINE IS ATTACHED TO   THE WOOD AND BOTH ARE IMMERSED  IN THE WATER IN THE CYLINDER.   ONCE AGAIN THE RISE IN VOLUME ISNOTED.  (3 MARKS)"
   1 '"THE PITCH CAN BE MEASURED USING A VARIABLE PITCH GENERATOR AND  ADJUSTING IT UNTIL NO 'BEATS'   CAN BE HEARD WITH THE SONOMETER.(2 MARKS)"
   1 '"THE MEAN MASS, M, SHOULD BE     WORKED OUT FIRST AND THIS FIGUREUSED IN THE CALCULATION OF THE  DIAMETER.    (2 MARKS)"
   1 '"THE IMAGE FORMED AT A DISTANCE  'u' FROM A LENS WAS MEASURED    FOR VARIOUS DISTANCES 'v' OF THEOBJECT. THE RESULTS ARE SET OUT IN THE TABLE BELOW:"
   1 '"THE EQUATION RELATING THE PITCH,f (Hz)
   1 '"THE ELECTRICAL RESISTANCE OF A  THERMISTOR SHOWS A HIGH RATE OF CHANGE WITH TEMPERATURE CHANGES."
   1 '"THE DENSITY OF THE STONE CAN BE CALCULATED FROM:"
   1 '"THE DENSITY OF AN"'"UNKNOWN LIQUID CAN"'"BE COMPARED WITH"'"A LIQUID OF KNOWN"'"DENSITY BY TAKING"'"THE RATIO OF THE"'"HEIGHTS 'x' TO 'h'"'"AND MULTIPLYING BY"'"THE DENSITY OF THE"'"KNOWN LIQUID:" 
   1 '"THE DENSITY CAN BE CALCULATED BYDIVIDING THE MASS OF SAND, ADDEDUNDER 2. ABOVE, BY THE RISE IN  VOLUME, RECORDED UNDER 3. ABOVE,AND MULTIPLYING THE RESULT BY   1000 AS THE VOLUME WAS MEASURED IN cm
   1 '"THE CURVE CHOULD HAVE THE SHAPE OF THE EXAMPLE GIVEN HERE. THE  m.pt. IS FOUND BY NOTING THE    TEMPERATURE THAT REMAINS STEADY FOR A WHILE AND THEN CONTINUES  TO FALL.(2 MARKS)"
   1 '"THE COPPER BLOCK CAN BE HEATED  TO 100
   1 '"THE COOLING CURVE SHOULD HAVE   THE TIME AS THE HORIZONTAL AXIS AND TEMPERATURE AS THE VERTICAL AXIS. (2 MARKS)"
   1 '"THE CONTENTS OF THE TEST TUBE   SHOULD BE STIRRED AT THE READINGOF THE TEMPERATURE TO ENSURE A  RELIABLE MEASUREMENT.(2 MARKS)"
   1 '"THE CALORIMETER RECEIVED A TOTALQUANTITY OF HEAT GIVEN BY:"''"   (t2-t1)*(Mw+0.017)*4180"
   1 '"THE BOTTLE, WHEN COLD, IS TAKEN OUT, DRIED AND THE TEMPERATURE  OF THE LIQUID NOTED AT THE SAME TIME AS THE STOPCLOCK AND HEATERARE STARTED. (3 MARKS)"
   1 '"THE BLOCK OF WAX WHICH IS FIRST TO MELT AND FALL OFF WILL SHOW  THE METAL OF GREATER THERMAL    CONDUCTIVITY. (2 MARKS)"
   1 '"THE APPARATUS SHOWN MEASURES THEEXPANSIVITY OF A SUBSTANCE IN   THE FORM OF A TUBE:"
   1 '"THE ANSWER MUST GIVE THE UNIT OFLENGTH, m, TO SCORE ANY MARKS ATALL."
   1 '"TAKING THE MEAN OF AT LEAST SIX MEASUREMENTS OF THE DENSITY OF  THE SAND WILL GIVE A GREATER    ACCURACY TO THE RESULT."'"(2 MARKS)"
   1 '"T(N) :  3.6 14.4 34.4 57.6 90.0 f(Hz):  2.0  4.5  6.5  8.5  11   T/M :  10   20   30   40   50":
   1 '"SUBTRACTING THE VOLUME OF THE   PLASTICINE FROM FROM THAT OF THEWOOD AND PLASTICINE TOGETHER    GIVES THE WOOD VOLUME.
   1 '"STRIKING THE BOARD WILL PRODUCE A SOUND PULSE WHICH WILL ECHO   BACK FROM THE WALL 200 m AWAY.  (2 MARKS)"
   1 '"STRIKING THE BOARD RHYTHMICALLY IN TIME WITH THE RETURNING SOUNDWILL GIVE, WHEN TIMED, A RATE OFSTRIKE, R. (3 MARKS)"
   1 '"STATE YOUR METHOD CLEARLY FOR   CALCULATING THE SPECIFIC THERMALCAPACITY OF COPPER FROM THE DATAYOU FIND FROM THE EXPERIMENT."
   1 '"STATE WHAT STEPS YOU WOULD TAKE TO ENSURE ACCURACY IN RESULT YOUOBTAIN FOR THE CONSTANT."'"(16 MARKS)"
   1 '"STATE CLEARLY IN YOUR METHOD HOWYOU ACCOUNT FOR ERRORS CAUSED BYWIND AND HUMAN REACTION TIME."
   1 '"SP.LAT. HEAT (kJ/kg)  MARKS"''"    315
   1 '"SP. LATENT HEAT = 600*t J/kg"
   1 '"SHOW IN YOUR ANSWER HOW YOU CAN COMPENSATE FOR THE LOSS OF HEAT DURING THE HEATING BY USING A   CONTAINER OF ICE-COLD WATER BIG ENOUGH TO HOLD THE PLASTIC      BOTTLE."
   1 '"PLOT THE DATA USING 1/u AS THE  HORIZONTAL AXIS AND 1/v AS THE  VERTICAL AXIS.  DRAW THE BEST   STRAIGHT LINE YOU CAN THROUGH   THE POINTS."
   1 '"PLOT A GRAPH OF THE ABOVE DATA  WITH f AS THE VERTICAL AXIS AND  T/M AS THE HORIZONTAL AXIS.":
   1 '"PERIOD (s)   :1.7 4.2 5.7 7.7 10LENGTH (m)   : 1   4   9  16  25 LENGTH      : 1   2   3   4   5":
   1 '"OTHER VALUES OF R SHOULD BE USEDSUCH AS THOSE LISTED BELOW:"
   1 '"ON FIRING THE GUN, THE INTERVAL BETWEEN SEEING THE FLASH AND    HEARING THE REPORT SHOULD BE    TIMED. (2 MARKS)"
   1 '"Mw IS THE MASS OF WATER IN kg.  (1 MARK)"
   1 '"Mc IS THE MASS OF COPPER IN kg. c IS THE SPECIFIC HEAT OF COPPERWHICH IS BEING CALCULATED.      (1 MARK)"
   1 '"MORE WATER IS THEN ADDED UNTIL  RESONANCE IS HEARD AGAIN AND A  NEW MEASUREMENT OF THE LENGTH OFTHE RESONATING COLUMN IS MADE.  (3 MARKS)"
   1 '"MEASUREMENTS MUST BE MADE WITH  THE SOUND TRAVELLING DIRECTLY   UPWIND OR DIRECTLY DOWNWIND. ANYOTHER DIRECTION OF THE SOUND    RELATIVE TO THE WIND WILL GIVE AVALUE LOWER THAN THE TRUE SPEED.(2 MARKS)"
   1 '"MEASUREMENT OF THE RADIOACTIVITY(AS KILO PULSES PER SECOND-kpps)FROM AN UNKNOWN ISOTOPE GAVE THERESULTS SHOWN BELOW OVER THE    PERIOD OF TIME INDICATED:"
   1 '"MAKE A GRAPH USING THE ABOVE    DATA WITH h AS THE HORIZONTAL   AXIS AND t
   1 '"LENGTH (m) = 1/(2*GRADIENT)"
   1 '"LENGTH (m) = 1/(2*GRADIENT)     (14 MARKS)"
   1 '"IT IS IMPORTANT TO REALISE THAT NOT ONLY IS HEAT BEING CONDUCTEDTOWARDS THE COLD END, IT IS ALSOBEING LOST FROM THE RODS TO THE SURROUNDING AIR. (3 MARKS)"
   1 '"INDICATE HOW YOU COULD CALCULATETHE REFRACTIVE CONSTANT OF THE  PERSPEX FROM THE RAY DIAGRAM YOUPRODUCE."
   1 '"IN THE MEANTIME THE CALORIMETER CAN BE FILLED WITH SUFFICIENT   WATER TO COVER THE COPPER BLOCK WHEN IMMERSED IN IT. (2 MARKS)"
   1 '"ICE(g) :1000 890 780 680 570 460TIME(s):   0  60 120 180 240 300"
   1 '"HUMAN REACTION TIME CAUSES A    DELAY BETWEEN SEEING THE FLASH  OF THE GUN AND STARTING THE STOPWATCH. THERE IS, HOWEVER, A     SIMILAR REACTION DELAY BETWEEN  HEARING THE REPORT AND STOPPING THE TIMING. SO THIS SOURCE OF   ERROR IS SELF-COMPENSATING.     (2 MARKS)"
   1 '"HEATING IS CONTINUED UNTIL THE  TEMPERATURE OF THE LIQUID IS AS MUCH ABOVE AMBIENT TEMPERATURE  AS IT WAS BELOW IT AT THE START.(2 MARKS)" 
   1 '"GIVEN A QUANTITY OF DRY SAND, A BALANCE, A MEASURING CYLINDER   GRADUATED IN cm
   1 '"GIVEN A HAMMER, A STOUT BOARD,  A STOPCLOCK AND AN ECHOING WALL 200 m AWAY FROM A MARKED SPOT,  DESCRIBE HOW YOU COULD MEASURE  THE SPEED OF SOUND ON A WINDLESSDAY."
   1 '"GIVE AN EXAMPLE OF"'"THE CALCULATION OF"'"A LIQUID DENSITY "'"USING THIS METHOD"'"WHEN THE DENSITY"'"OF LIQUID 'H' IS"'"1212 kg/m
   1 '"GIVE AN EXAMPLE OF THE SHAPE OF THE COOLING CURVE YOU WOULD GET IN YOU EXPERIMENT."'"(16 MARKS)"
   1 '"GAVE, FOR A STRING OF 0.036kg/m,THE FOLLOWING RESULTS FOR THE   FREQUENCY, f, UNDER VARIOUS     TENSIONS, T:"
   1 '"FROM 2.10  
   1 '"FRACTIONAL VALUES FOR R CAN BE  MADE WITH RESISTORS IN PARALLEL AS WELL AS IN SERIES:"
   1 '"FOR THIS PURPOSE YOU ARE GIVEN  A SOURCE OF CONSTANT e.m.f. OF  6.0 V
   1 '"FOR INSTANCE, TIMING 100 BLOWS  STRUCK RHYTHMICALLY IN TIME WITHTHE RETURNING ECHO COULD TAKE   'T' SECONDS, GIVING THE RATE OF STRIKE, R, AS:"
   1 '"FIND THE INTERCEPT ON THE 1/u   AXIS WHEN 1/v = 0."
   1 '"FIND THE GRADIENT OF THE LINE   AND CALCULATE 'g' FROM:"
   1 '"FIND THE GRADIENT (SLOPE) OF THEGRAPH AND CALCULATE A VALUE FOR 'g' FROM THE EQUATION:"
   1 '"FINALLY THE SLOPE (GRADIENT) OF THE LINE SHOULD BE DETERMINED TOGET THE RATE OF CHANGE OF LENGTHWITH TEMPERATURE FOR THE SAMPLE.(2 MARKS)"
   1 '"FINALLY THE LENGTH OF THE STEM  BETWEEN THE CALIBRATION MARKS ISDIVIDED INTO 100 PARTS EQUALLY  SPACED APART AND A FURTHER 10   SUCH DIVISIONS MARKED AT EACH   END TO COVER THE INTENDED RANGE -10
   1 '"EXPLAIN HOW YOU COULD MEASURE   THE VELOCITY OF SOUND IN DAMP   AIR USING ONLY A TUNING FORK OF KNOWN FREQUENCY (880 Hz), A     GLASS CYLINDER 50 cm HIGH, WATERAND AN ACCURATE RULER."
   1 '"EXPLAIN HOW YOU COULD MEASURE   THE SPECIFIC THERMAL CAPACITY OF1 kg OF LIQUID IN A LIGHTWEIGHT PLASTIC BOTTLE, USING A TIMER,  A FIXED WATTAGE HEATING COIL ANDA THERMOMETER COVERING THE RANGE-10
   1 '"EXPLAIN HOW YOU CAN MEASURE THE VOLUME OF AN IRREGULAR PIECE OF WOOD USING A GRADUATED MEASURINGCYLINDER WIDE ENOUGH TO HOLD THEWOOD, WATER AND SOME PLASTICINE.(10 MARKS)"
   1 '"EQUAL BLOCKS OF"'"WAX, m.pt. 85
   1 '"EFFORT(N) :  4  11  16  20   24 LOAD(N)   :200 400 600 800 1000"
   1 '"DRAW THE BEST STRAIGHT LINE YOU CAN THROUGH THE POINTS AND USE  THE LINE TO FIND THE TIME, t,   NEEDED TO MELT ALL THE ICE."
   1 '"DRAW THE BEST STRAIGHT LINE YOU CAN THROUGH THE POINTS AND FROM IT THE VALUE FOR THE INTERNAL   RESISTANCE OF THE CELL AS THE   HORIZONTAL AXIS INTERCEPT."
   1 '"DRAW THE BEST STRAIGHT LINE YOU CAN THROUGH THE POINTS AND FIND ITS GRADIENT (SLOPE)."
   1 '"DRAW SUITABLE CIRCUITS FOR THE  METHOD YOU DESCRIBE."
   1 '"DRAW A STRAIGHT LINE THROUGH THEPOINTS PLOTTED WITH 
   1 '"DRAW A DIAGRAM OF THE CIRCUIT   YOU WOULD USE IN YOUR METHOD.   (14 MARKS)";
   1 '"DIBENZYL IS A WHITE SOLID WITH Am.pt. BETWEEN 30
   1 '"DESCRIBE HOW YOU WOULD USE THIS EQUIPMENT TO MEASURE THE THERMALEXPANSIVITY OF ALUMINIUM IN THE FORM OF A TUBE, OVER THE RANGE  0
   1 '"DESCRIBE HOW YOU WOULD TRACE THEPASSAGE OF LIGHT RAYS THROUGH A RECTANGULAR BLOCK OF PERSPEX OF ABOUT 10cm LENGTH, 6cm WIDTH AND2cm THICKNESS, USING A RULER, A LARGE SHEET OF PAPER, FOUR PINS AND A PENCIL."
   1 '"DESCRIBE HOW YOU WOULD SET ABOUTCALIBRATING THE INSTRUMENT.     SPECIFY THE EQUIPMENT YOU WOULD REQUIRE FOR THE PURPOSE."
   1 '"DESCRIBE HOW YOU WOULD MEASURE  THE SPEED OF SOUND ON A WINDY   DAY.  YOU ARE PROVIDED WITH AN  ASSISTANT, A STOPWATCH READING  TO 0.1 s, A 500 m MEASURING TAPE
   1 '"DESCRIBE HOW YOU WOULD MEASURE  THE SPECIFIC THERMAL CAPACITY OFCOPPER.  YOU ARE PROVIDED WITH  A BLOCK OF COPPER, A LENGTH OF  FINE WIRE, BOILING WATER IN A   BEAKER LARGE ENOUGH TO TAKE THE COPPER BLOCK, A CALORIMETER WITHA WATER EQUIVALENT OF 17 g 
   1 '"DESCRIBE HOW YOU WOULD MEASURE  THE DENSITY OF THE STONE USING  THE EQUIPMENT PROVIDED. MENTION ONE FACTOR THAT WOULS ENABLE YOUTO IMPROVE THE ACCURACY OF THE  DENSITY MEASUREMENT.            (10 MARKS)"
   1 '"DESCRIBE HOW YOU WOULD FIND THE MEAN DIAMETER KNOWING THAT THE  DENSITY OF GLASS IS 2300 kg/m
   1 '"DESCRIBE HOW YOU WOULD COMPARE  THE THERMAL CONDUCTIVITY OF THE TWO METALS. POINT OUT AN OBVIOUSDEFECT INHERENT IN THIS METHOD."
   1 '"DESCRIBE HOW YOU WOULD CARRY OUTAN INVESTIGATION INTO THE EFFECTON PITCH OF DIFFERENT DIAMETER  STEEL WIRES UNDER EQUAL TENSION."
   1 '"DESCRIBE HOW YOU WOULD CALIBRATEAN UNMARKED MOVING COIL AMMETER HAVING AN INTERNAL RESISTANCE OF0.5 
   1 '"DESCRIBE HOW YOU WOULD CALIBRATEA TERMISTOR OVER THE RANGE 0
   1 '"DENSITY=1324*M1/(M1+M2-M3) kg/m
   1 '"COMMENT ON POSSIBLE SOURCES OF  ERROR IN YOUR METHOD AND HOW    THEY CAN BE MINIMISED."
   1 '"CALCULATE THE SPECIFIC LATENT   HEAT OF FUSION OF ICE FROM:"
   1 '"CALCULATE THE SLOPE OF THE LINE AND THEN THE REFRACTIVE CONSTANTWHICH IS EQUAL TO THE RECIPROCALOF THE SLOPE:"''"REFRACTIVE CONSTANT = 1/(SLOPE)"''"(16 MARKS)"
   1 '"CALCULATE THE FOCAL LENGTH OF   THE LENS FROM THE EQUATION:"''"  FOCAL LENGTH = 1/(INTERCEPT)"
   1 '"CALCULATE THE EFFICIENCY FROM:"''"  E% = 2/GRADIENT.";
   1 '"BY MAKING THE TUNING FORK SOUND OVER THE MOUTH OF THE CYLINDER  AS IT IS GRADUALLY FILLED WITH  WATER A RESONANCE POINT CAN BE  CLEARLY HEARD. (2 MARKS)"
   1 '"AT THIS POINT THE LENGTH BETWEENTHE MOUTH OF THE CYLINDER AND   THE WATER LEVEL IN THE CYLINDER.(2 MARKS)"
   1 '"AT LEAST 5 MEASUREMENTS SHOULD  BE MADE IN EACH DIRECTION, UP   WIND AND DOWNWIND (2 MARKS) AND THE COMPLETE SET REPEATED HAVINGEXCHANGED FIRING FOR TIMING WITHYOUR ASSISTANT. (2 MARKS)"
   1 '"ALL THE RESULTS SHOULD THEN BE  PLOTTED WITH TEMPERATURE AS THE HORIZONTAL AXIS AND INCREASE IN LENGTH AS THE VERTICAL AXIS. THEBEST STRAIGHT LINE THROUGH THE  POINTS SHOULD BE DRAWN.         (4 MARKS)"
   1 '"A THERMISTOR CONSISTS OF A SMALLSEMI-CONDUCTING CERAMIC BEAD    WITH TWO WIRE CONNECTIONS TO IT."
   1 '"A TABLE OF RESULTS SHOULD BE    PREPARED AND FROM THE DATA A    GRAPH OF WIRE DIAMETER AS THE   HORIZONTAL AXIS AGAINST PITCH   AS THE VERTICAL AXIS SHOULD BE  DRAWN. (2 MARKS"
   1 '"A STUDY OF THE EQUATION FOR A   VIBRATING STRING:"
   1 '"A SIMILAR SET OF RESULTS SHOULD BE OBTAINED DECREASING THE HIGH TEMPERATURE BY SIMILAR INTERVALSAS BEFORE. (3 MARKS)"
   1 '"A QUANTITY OF HOT WATER SHOULD  BE PUT IN A BEAKER AND THE TEST TUBE WITH MOLTEN DIBENZYL PLACEDIN IT. (2 MARKS)"
   1 '"A MEAN OF AT LEAST FIVE REPEATEDMEASUREMENTS WOULD GIVE A MORE  ACCURATE RESULT. (2 MARKS)";
   1 '"A MACHINE WITH A VELOCITY RATIO OF 50 GAVE THE VALUES IN THE    TABLE FOR THE EFFORT NEEDED TO  LIFT VARIOUS LOADS:"
   1 '"A HEATING COIL GIVING 600 J/s   WAS USED TO MELT 1 kg OF ICE AT 0
   1 '"A GRAPH SHOULD BE DRAWN FROM THERESULTS WITH TEMPERATURE AS THE HORIZONTAL AXIS AND RESISTANCE  AS THE VERTICAL AXIS."'"(3 MARKS)"
   1 '"A FINAL VALUE FOR n SHOULD BE   FOUND FROM THE MEAN OF AT LEAST FIVE DIFFERENT RAY POSITIONS."
   1 '"7.1 TO 7.4 N ... 1 MARK"
   1 '"1. WEIGH THE DRY STONE AND NOTE    ITS MASS (M1)."
   1 '"1. FIND THE HALF-LIFE OF THE       RADIOACTIVE ISOTOPE.         2. FIND THE ACTIVITY AFTER 3.5     MINUTES FROM THE START."
   1 '"1. FILL THE CYLINDER WITH WATER    TO A SUITABLE LEVEL ALLOWING    FOR THE NEXT OPERATION.         (1 MARK)"
   1 '"(4 MARKS)"
   1 '"(2 MARKS)"
   1 '"(10 MARKS)";
   1 '" YOU SHOULD FIND LITTLE TROUBLE  IN FITTING THE WORK INTO THE    45 MINUTES ALLOCATED."
   1 '" THIS SHOULD ENCOURAGE YOU TO    COMPLETE THIS AND THE PROGRAMS  THAT FOLLOW AND GAIN GENUINE    CONFIDENCE OF SUCCESS."
   1 '" PAY PARTICULAR ATTENTION TO     MARKING THE AXIS CORRECTLY IN   YOUR GRAPHS. REMEMBER THAT IT   IS BETTER TO START AFRESH THAN  TO PRESENT WORK THAT HAS BEEN   IN SOME WAY 'CORRECTED'."
   1 '" Dx=(x/h)Dh"''"(4 marks)";
   1 '"  FOCAL LENGTH(m)    MARKS"''"   1.15
   1 '"  Dx = (x/h)*1212  kg/m
   1 '"   g = 39.2/(SLOPE)
   1 '"   ZERO LOAD(N)       MARKS"''"   0.80
   1 '"   R int (
   1 '"    g = 2/(GRADIENT) (12 MARKS)";
   1 '"    EFFICIENCY %  MARKS"''"    80.5
   1 '"     d = 
   1 '"     (100-t2)*Mc*c"''"    = (t2-t1)*(Mw+0.017)*4180"
   1 '"      g (m/s
   1 '"       (t2-t1)*(Mw+0.017)*4180"'"  c ="'"            (100-t2)*Mc"'"(2 MARKS)"
   1 '"        g(m/s
   1 '"        c = W * T"
   1 '"         n           MARKS"''"   1.55
   1 '"           V = 2*(200/R)"
   1 '"            R = 100/T"'"(3 MARKS)"
   1 "YOU WOULD BE EXPECTED TO FILL   THE INSULATED CONTAINER WITH THELIQUID, PLACE THE THERMOMETER   AND THE HEATING COIL IN IT AT   THE START (2 MARKS)."
   1 "YOU ARE SUPPLIED WITH TWO EQUAL PIECES OF PLASTICINE, A RULER,  A CLOCK, A LARGE WATER TROUGH   WITH WATER AND A SMOOTH STEEL   BALL ABOUT 5 cm IN DIAMETER."
   1 "YOU ARE PROVIDED WITH A QUANTITYOF DRY, WASHED SAND, A MEASURINGCYLINDER GRADUATED IN cm
   1 "YOU ARE PROVIDED WITH A LONG    LENGTH OF THIN WIRE AND A RULER GRADUATED IN MILLIMETRES."
   1 "YOU ARE PROVIDED WITH A LARGE   SHEET OF THIN POLYTHENE (ABOUT  0.2 mm THICK), A RULER GRADUATEDIN mm AND A PAIR OF SCISSORS. "
   1 "WITH THE VERTICAL AXIS FOR THE  CURRENT AND THE HORIZONTAL AXIS FOR THE VOLTAGE, PLOT THE ABOVE DATA AND DRAW THE BEST STRAIGHT LINE YOU CAN THROUGH THE POINTS."
   1 "WITH THE POSITION OF THE PINS   MARKED, THE BLOCK IS REMOVED ANDTHE POINTS JOINED TO SHOW THE   PATH OF THE RAY."
   1 "WIRE DIAMETER=Y/100 mm.(2 MARKS)"
   1 "WIRE DIAMETER=10/X mm. (2 MARKS)"
   1 "WHEN THE LIQUID REACHES A STEADYTEMPERATURE, THE HEATING COIL ISSWITCHED ON AND TIMING COMMENCED(2 MARKS)."
   1 "WHEN Dh EQUALS 1212 kg/m
   1 "WATER LEFT OVER        = 65 cm
   1 "WATER IS PASSED THROUGH THE TUBEAT A CONTROLLED TEMPERATURE FROM0
   1 "USING THE HEATING COIL WITH 1 
   1 "TO SHOW THAT THE CENTRE OF MASS IS AT THE CROSSOVER POINT, THE  LAMINATE CAN BE BALANCED ON THE TIP OF THE PENCIL PLACED EXACTLYAT THAT POINT(3 MARKS)."
   1 "TO DO THIS WILL REQUIRE ABOUT   100 SMALL POLYTHENE SQUARES.    (1 MARK)" 
   1 "TO CALCULATE THE REFRACTIVE     CONSTANT A PERPENDICULAR IS     DRAWN THROUGH THE POINT 'A' AND THE ANGLES XAB AND YAC MEASURED."
   1 "THEN WATER IS ADDED TO THE SAND IN THE CYLINDER FROM THE BEAKER UNTIL ALL THE AIR IS DISPLACED  FROM THE SAND AND THE WATER IS  ONCE MORE AT THE SAME VOLUME AS AT THE START.  SOME WATER WILL  BE LEFT OVER IN THE BEAKER.     (2 MARKS)"
   1 "THE b.pt. OF THE MIXTURE CAME TO67
   1 "THE WEIGHT OF THE BEAM ACTS AT  ITS MID-POINT AND IN FAVOUR OF  THE EFFORT AT F:","(1 MARK)"
   1 "THE VIBRATING LENGTH IS GIVEN BYTHE EQUATION:"
   1 "THE SPECIFIC THERMAL CAPACITY OFTHE LIQUID CAN BE MEASURED BY   OBSERVING THE TEMEPERATURE RISE PRODUCED BY HEATING THE 1 kg    MASS SUPPLED WITH THE COIL FOR  A TIMED PERIOD.  (3 MARKS)"
   1 "THE RESISTANCE IS GIVEN BY:",,,"RESISTANCE (
   1 "THE REPORTED FIGURE FOR THE MEANTHICKNESS OF THE SHEET MUST NOT BE QUOTED TO AN EXCESSIVE DEGREEOF ACCURACY.":
   1 "THE REFRACTIVE INDEX = h/d      (1 MARK)"
   1 "THE REFRACTIVE CONSTANT IS:"
   1 "THE REFRACTIVE CONSTANT FOR THE MIXTURE OF ";WA;" g OF HEXANE AND "'WB;"gOF TETRABROMO METHANE IS"'"FOUND BY MULTIPLYING THE DIF-"'"FERENCE IN REFRACTIVE CONSTANT  OF THE LIQUIDS,(1.6000-1.3754 = 0.2245) BY THE PROPORTION OF    TETRABROMO METHANE:"
   1 "THE RATIO OF THE REAL DEPTH TO  THE APPARENT DEPTH OF AN OBJECT IMMERSED IN A LIQUID PROVIDES A SIMPLE METHOD FOR MEASURING ITS REFRACTIVE CONSTANT.  (1 MARK)"
   1 "THE PROPROTION OF WATER MIXED   WITH ACETONE CAN BE FOUND BY:"
   1 "THE PROPORTION OF PROPANOL, BY  VOLUME, IS:"
   1 "THE PROPORTION OF PROPANOL, BY  VOLUME, IN THE MIXTURE IS WORKEDOUT BY:"
   1 "THE POSITION OF THE POINTER FOR EACH VALUE OF THE CURRENT SHOULDBE CLEARLY MARKED ON THE DIAL.  (1 MARK)"
   1 "THE PITCH OF EACH STRING SHOULD BE MEASURED UNDER EQUAL TENSION.(2 MARKS)"
   1 "THE MECHANICAL ADVANTAGE IS THE RATIO OF THE LOAD TO THE EFFORT:      M.A. = 800/184 = 4.34     (3 MARKS)"
   1 "THE MEASUREMNT OF THE HEIGHT OF THE PILE SHOULD BE MADE WITH THESTACK OF SMALL SQUARES UNDER A  FIRM PRESSURE TO PREVENT AIR IN THE PILE ADDING FALSE HEIGHT.   (3 MARKS)"
   1 "THE MEAN BOILING POINT OF THE   MIXTURE SHOULD BE QUOTED TO NO  GREATER ACCURACY THAN 0.2
   1 "THE LINES FOR EACH POSITION WILLBE SEEN TO CROSS AT ONE POINT-  THE CENTRE OF MASS (2 MARKS)."
   1 "THE LAMINATED SHEET IS BALANCED ON THE FINE EDGE OF THE RULER   (2 MARKS). THEN A FINE LINE IS  DRAWN ON THE LAMINATE ALONG THE EDGE OF THE RULER (1 MARK)."
   1 "THE FOLLOWING VALUES FOR ZERO   LOAD AND THE GRADIENT SCORE THE MARKS SHOWN:"
   1 "THE FOLLOWING VALUES FOR THE    REFRACTIVE CONSTANT SCORE MARKS:"
   1 "THE FOLLOWING VALUES FOR THE    INTERNAL RESISTANCE OF THE CELL SCORE MARKS:"
   1 "THE FOLLOWING VALUES FOR THE    GRADIENT SCORE MARKS:"
   1 "THE FOLLOWING VALUES FOR THE    ELASTIC LIMIT SCORE MARKS:"
   1 "THE FOLLOWING VALUES FOR 'g'    SCORE MARKS, PROVIDED THE UNITS ARE QUOTED (m/s
   1 "THE FOLLOWING EFFICIENCY VALUES SCORE MARKS:"
   1 "THE FINAL FIGURE FOR THE MEAN   DIAMETER SHOULD NOT BE QUOTED   TO MORE THAN THREE SIGNIFICANT  FIGURES.  (1 MARK)"
   1 "THE EXPECTED METHOD IS TO WIND  THE WIRE INTO A COIL OVER THE   RULER WITH THE TURNS AS CLOSE ASPOSSIBLE.  (3 MARKS)"
   1 "THE EXPECTED METHOD IS TO FILL  THE MEASURING CYLINDER, TO ITS  MAXIMUM GRADUATED VOLUME, WITH  WATER AND PLACE THIS MEASURED   VOLUME INTO THE DRY BEAKER.     (2 MARKS)"
   1 "THE EXPECTED METHOD IS TO CUT UPTHE POLYTHENE SHEET INTO ENOUGH SMALL SQUARES SO THAT WHEN THEY ARE PILED UP THE TOTAL HEIGHT OFTHE PILE WOULD BE ABOUT 20 mm - A CONVENIENT SIZE TO MEASURE.   (3 MARKS)"
   1 "THE EFFICIENCY IS 100 TIMES THE MECHANICAL ADVANTAGE DIVIDED BY THE VELOCITY RATIO:",,," EFF. = 100*(4.34/3.2) = 137%   (2 MARKS)"
   1 "THE EFFICIENCY EXCEEDS 100% IN  THIS CASE BECAUSE THE WEIGHT OF THE BEAM ASSISTS THE EFFORT.    (2 MARKS)"
   1 "THE DIAMETER OF THE DENT GIVES AMEASURE OF THE HARDNESS OF THE  PLASTICINE (2 MARKS)."     
   1 "THE DATA GIVEN BELOW WAS NOTED  DURING A STUDY OF THE EXTENSION OF A SPRING.",, "(L = LOAD(N); E = EXTENSION(cm)"
   1 "THE CYLINDER IS THEN WIPED DRY  AND FILLED TO THE SAME VOLUME   WITH DRY SAND.  (2 MARKS)"
   1 "THE CYLINDER IS CLEANED OUT AND DRIED AGAIN.  THEN THE WATER IN THE BEAKER IS MEASURED TO FIND  THE SOLID VOLUME OF THE SAND.   (2 MARKS)"
   1 "THE CYLINDER FULL OF SAND SHOULDBE TAPPED GENTLY ON THE BENCH TOSETTLE THE SAND DOWN.","AIR TRAPPED IN THE SAND WHEN THEWATER IS ADDED CAN BE RELEASED  BY ROTATING THE CYLINDER BETWEENTHE HANDS BRISKLY.","(3 MARKS)" 
   1 "THE COMPOSITION OF THE MIXTURE  CAN BE CALCULATED FROM ITS b.pt.BY:"
   1 "THE BOILING POINT MEASUREMENT   SHOULD BE REPEATED AT LEAST FIVETIMES AND A MEAN CALCULATED.    (2 MARKS)"
   1 "THE BEAM SHOWN IN THE DIAGRAM ISUSED TO LIFT A LOAD OF 800 N."
   1 "THE BALANCING IS REPEATED FOR ATLEAST 5 OTHER POSITIONS OF THE  LAMINATE (2 MARKS)."
   1 "THE AVERAGE THICKNESS IS:","     22.5/100 mm, i.e. 0.225 mm."
   1 "THE APPROPRIATE METHOD IS BASED ON RESONANCE. (1 MARK)"
   1 "THE APPARENT DEPTH, d, OF THE   MARK IS MEASURED USING PARALLAX TO COINCIDE A PIN, PLACED ALONG-SIDE THE CONTAINER, WITH THE    MARK WHEN VIEWED FROM ABOVE.    (1 MARK)"
   1 "THE ANSWER SHOULD START WITH THESETTING UP OF THE EQUIPMENT WITHTHE TEMPERATURE AT, SAY, 0
   1 "THE AIR SPACE BETWEEN THE SAND  GRAINS IS FOUND BY SUBTRACTING  THE VOLUME OF WATER LEFT IN THE BEAKER FROM THE ORIGINAL VOLUME OF WATER USED.",,"(2 MARKS)"
   1 "TAKE THE TEMPERATURE WHEN THE   MIXTURE JUST STARTS TO BOIL.    (1 MARK)"
   1 "STATE HOW YOU CAN SHOW THAT THE EXACT CENTRE OF MASS HAS BEEN   FOUND, USING ONLY THE EQUIPMENT PROVIDED (3 MARKS)."
   1 "STATE HOW THE ABOVE DATA CAN  BE USED TO FIND THE PROPORTION OF WATER IN A MIXTURE WITH ACETONE."
   1 "SOME METHOD OF MAKING SURE THE  TURNS ARE AS CLOSE AS POSSIBLE  SHOULD BE MENTIONED.  (2 MARKS)"
   1 "REPEATING THE EXPERIMENT AT     LEAST FIVE TIMES WILL IMPROVE   THE ACCURACY OF THE MEAN RESULT.(2 MARKS)"
   1 "REPEATED MEASUREMENT, AT LEAST  FIVE TIMES, IMPROVES ACCURACY   (2 MARKS)."
   1 "QUESTION 1.":
   1 "PUTTING THE PREPARED PLASTICINE SLABS AND THE STEEL BALL IN THE WATER TROUGH LONG ENOUGH, SAY 30MINUTES, WILL REMOVE VARIATIONS DUE TO TEMPERATURE DIFFERENCES  (3 MARKS)." 
   1 "PROPANOL IS A LIQUID HAVING A   DENSITY OF 804.4";U$;" 
   1 "PRESS 'ENTER'.   ";I$:
   1 "PRESS 'ENTER'.   ";I$
   1 "PRESS 'ENTER' TO SEE THE MARKINGSCHEME, ENTER 'R' TO REVIEW THE QUESTION.  ";
   1 "PRESS 'ENTER' TO SEE THE MARKINGSCHEME ENTER 'R' TO REVIEW THE  QUESTION.  ";I$:
   1 "PRESS 'ENTER' FOR THE LAST STAGE";I$
   1 "PRESS 'ENTER' FOR THE GRAPH.";I$:
   1 "PRESS 'ENTER' FOR MARKING.  ";I$:
   1 "PREPARING THE PLASTICINE SLABS  ON THE SHAPE OF A SQUARE OF THE SAME SIZE FOR BOTH SAMPLES WILL ELIMINATE POSSIBLE THICKNESS    DIFFERENCES (2 MARKS)."
   1 "PLOT LOAD AS THE HORIZONTAL AXISAND EXTENSION AS THE VERTICAL   AXIS. DRAW A STRAIGHT LINE GRAPHTHROUGH THE RELIABLE POINTS, ANDFROM THE GRAPH:"
   1 "PLOT A GRAPH HAVING 1/p AS THE  X-AXES (HORIZONTAL) AND v AS THEY-AXES (VERTICAL). DRAW THE BESTSTRAIGHT LINE THROUGH THE POINTSAND THROUGH THE ZERO VALUES."
   1 "PHYSICS 9"
   1 "PHYSICS 17"
   1 "PHYSICS 16"
   1 "PHYSICS 11"
   1 "PHYSICS 10"
   1 "PHYSICS 1"
   1 "PHYISCS 22"
   1 "PHYISCS 21"
   1 "PHYISCS 20"
   1 "PHYISCS 19"
   1 "PHYISCS 18"
   1 "PHYISCS 15"
   1 "PHYISCS 14"
   1 "PHYISCS 13"
   1 "PHYISCS 12"
   1 "PAY PARTICULAR ATTENTION, IN    YOUR ANSWER, TO THE CONTROL OF  TEMPERATURE AND TO ANY OTHER    FACTORS YOU CONSIDER WOULD HAVE AN AFFECT ON THE ACCURACY OF THERESULTS."
   1 "P(kPa): 1.00 1.11 1.25 1.43 1.67V(dm
   1 "ORIGINAL WATER VOLUME  =100 cm
   1 "ON A FLAT SLAB OF PLASTICINE THESTEEL BALL WOULD MAKE A CIRCULARDENT DEPENDING ON HOW LONG IT ISLEFT ON THE PLASTICINE (1 MARK),THE TEMPERATURE OF THE SAMPLE   (2 MARKS) AND THE THICKNESS OF  THE SLAB (2 MARKS)."
   1 "LOAD(N)  10   20   30   40   50 FORCE(N)1.60 1.95 2.55 2.90 3.55"
   1 "LEAVING THE STEEL BALL ON THE   PLASTICINE FOR EQUAL TIMES WILL MAKE THE TEST EQUALLY FAIR FOR  BOTH SAMPLES(2 MARKS)."
   1 "L000048008008020034065000"
   1 "L(N) : 1 2 3 4 5 6 7  8   9  10 E(cm): 1 2 3 4 5 6 7 7.7 8.3 8.6"
   1 "INDICATE IN YOUR ANSWER THE MAINSOURCES OF ERROR YOU WOULD FIND AND THE MEASURES YOU COULD TAKE TO MINIMISE THEM."
   1 "IN THIS TYPE OF EXPERIMENT TWO  MAIN HEAT LOSSES ARISE: THE HEATUSED TO WARM UP THE EQUIPMENT   i.e. THE CONTAINER, THERMOMETER AND COIL
   1 "IN THIS METHOD A MARK IS MADE ONTHE BOTTOM OF A CONTAINER AND ITIS THEN FILLED TO A HEIGHT, h,  WITH THE LIQUID.  (1 MARK)"
   1 "IN THIS CASE THE DENSITY OF THE MIXTURE WAS ";Dm;U$;" SO ";("HERE"
   1 "IN SETTING UP THE EQUIPMENT YOU MUST BE SURE THE WAX BLOCKS ARE EQUAL IN SIZE AND THE ATTACHMENTTO THE METAL RODS IS THE SAME INBOTH CASES. (2 MARKS)"
   1 "IN PRINCIPLE THIS EXPERIMENT    REQUIRES THE COPPER BLOCK TO BE HEATED TO A KNOWN TEMPERATURE   
   1 "IN ALL CASES THE UNIT, 
   1 "I(A)  = 3.45 2.63 1.79 1.54 1.25":
   1 "HEXANE HAS A REFRACTIVE CONSTANTOF 1.3754 THAT OF TETRABROMO    METHANE IS 1.6000.  WHAT VALUE  OF REFRACTIVE CONSTANT WOULD BE EXPECTED FOR A MIXTURE OF ";WA;"g"'"OF HEXANE WITH ";WB;"g OF TETRA-"'"BROMO METHANE?"
   1 "HEAT THE MIXTURE IN A TEST TUBE IN A CONTAINER OF HOT WATER AWAYFROM FLAMES.",,"(2 MARKS)"
   1 "GRAPH THIS DATA USING R (
   1 "GIVEN THAT THE BEAM WEIGHS 100 NAND THE PIVOT HAS NO FRICTION,  CALCULATE THE EFFORT NEEDED TO  LIFT THE LOAD, THE MECHANICAL   ADVANTAGE OF THE SYSTEM AND ITS EFFICIENCY. "; 
   1 "GIVEN AN INSULATED CONTAINER,   A HEATING COIL OF FIXED WATTAGE,A THERMOMETER AND A STOPCLOCK,  DESCRIBE HOW YOU WOULD MEASURE  ACCURATELY THE RATE OF RISE OF  TEMPERATURE IN A LIQUID BEING   HEATED BY THE COIL.  COMMENT ON THE MAIN HEAT LOSSES ARISING    FROM YOUR EXPERIMENT."
   1 "G000000000000000000000000"
   1 "FROM 1.30
   1 "FOR A BEAM, THE VELOCITY RATIO  IS SIMPLY THE RATIO OF THE ARMS:      V.R. = 16/5 = 3.2         (2 MARKS)"
   1 "FIRST AN AMOUNT OF PLASTICINE   SUFFICIENT TO SINK THE WOOD IS  FOUND (2 MARKS)."
   1 "FIND THE GRADIENT (SLOPE) OF THEGRAPH AND SO CALCULATE THE VALUEOF k IN THE EQUATION:",,,
   1 "F=(4000-1050)/16=184 N.(3 MARKS)"
   1 "EXPLAIN THE UNUSUAL VALUE FOR THE EFFICIENCY."
   1 "EXAMPLE:":
   1 "ENTER 'Y' TO REVIEW THE QUESTIONPRESS 'ENTER' TO SEE THE MARKINGSCHEME.   ";I$:
   1 "ENTER 'Y' TO REVIEW THE QUESTIONPRESS 'ENTER' TO FINISH.  ";I$:
   1 "ENTER 'Y' TO REVIEW THE DIAGRAM PRESS 'ENTER' FOR THE MARKING   SCHEME.   ";I$:
   1 "EITHER THE TIME MAY BE TAKEN FORA FIXED RISE IN TEMPERATURE OR  THE RISE CAN BE MEASURED FOR A  FIXED TIME PERIOD. IN BOTH CASESTHE RATE OF TEMPERATURE RISE IS THE TOTAL RISE DIVIDED BY THE   TIME TAKEN (2 MARKS)."
   1 "DRAW THE BEST STRAIGHT LINE YOU CAN THROUGH THE POINTS. WORKOUT THE GRADIENT (SLOPE) OF THE LINEAND USE IT TO FIND THE VIBRATINGLENGTH OF THE STRING, l, FROM:"
   1 "DO NOT ALLOW THE MIXTURE TO BOILFOR LONG IN THE HOT WATER- THIS MAY CHANGE ITS COMPOSITION.     (1 MARK)" 
   1 "DESCRIBE HOW YOU WOULD USE THE  EQUIPMENT SUPPLIED TO COMPARE   THE HARDNESS OF THE TWO SAMPLES."
   1 "DESCRIBE HOW YOU WOULD MEASURE  ACCURATELY THE AVERAGE THICKNESSOF THE POLYHENE."
   1 "DESCRIBE HOW YOU WOULD MEASURE  ACCURATELY THE AVERAGE DIAMETER OF THE WIRE."
   1 "DESCRIBE HOW YOU WOULD DETERMINETHE BOILING POINT OF A MIXTURE  OF THESE TWO LIQUIDS AND EXPLAINHOW YOU COULD ESTIMATE, FROM THEBOILING POINT, THE PROPORTIONS  OF THE TWO COMPONENTS."
   1 "DESCRIBE HOW YOU COULD USED THE EQUIPMENT SUPPLIED TO MEASURE   THE SPACE BETWEEN THE PARTICLES OF SAND ON A VOULME BASIS, i.e. 
   1 "DESCRIBE AND MAKE A DIAGRAM OF ASIMPLE METHOD FOR MEASURING THE REFRACTIVE CONSTANT OF A LIQUID.STATE HOW YOU THINK ACCURACY IN THE METHOD YOU DESCRIBE COULD BEIMPROVED."
   1 "DESCRIBE A METHOD FOR MEASURING THE DENSITY OF A LIQUID AT ROOM TEMPERATURE."
   1 "DESCRIBE A METHOD FOR FINDING   THE CENTRE OF MASS OF A THIN    SHEET OF IRREGULARLY SHAPED HARDLAMINATED PLASTIC. YOU ARE GIVENONLY A PENCIL AND A FINE-EDGED  RULER WITH WHICH TO WORK."
   1 "D000000000000000000000000"
   1 "CURRENT(A):  1.0 1.0 2.0 2.0 3.0VOLTAGE (V):  1   2   3   4   5"
   1 "CLOCKWISE-  F*16 + 100*10.5"
   1 "CALIBRATING THE 0
   1 "CALCULATE THE GRADIENT (SLOPE)  OF THE LINE AND HENCE THE VALUE OF THE RESISTANCE WHICH IS EQUALTO THE RECIPROCAL OF THE SLOPE."
   1 "BY WINDING 'X' TURNS SO THAT THECOIL IS 10 mm WIDE, FOR EXAMPLE,THE AVERAGE DIAMETER OF THE WIRECAN BE FOUND FROM:"
   1 "BOTH PINS ARE VIEWED THROUGH THEBLOCK AND PINS AT 'C' AND 'D'   ARE PLACED DIRECTLY IN LINE WITHTHE FIRST TWO. CARE AND PATIENCEARE NEEDED TO GET THIS RIGHT."
   1 "AT LEAST FIVE MEASUREMENTS OF   THE DIAMETER SHOULD BE MADE AND A MEAN TAKEN. (2 MARKS)"
   1 "AT LEAST 100 MARBLES SHOULD BE  WEIGHED AND THEIR MASS RECORDED.(2 MARKS)"
   1 "ASSUMING BOTH LIQUIDS MIX FREELYWITH NO VOLUME CHANGE, CALCULATETHE PROPORTION, BY VOLUME, OF   PROPANOL TO WATER IN A MIXTURE  OF DENSITY ";Dm;U$;"."
   1 "ANTICLOCKWISE- 800*5 = 4000 Nm"
   1 "AND ADDING TO THIS THE VALUE OF THE REFRACTIVE CONSTANT, 1.3754,OF HEXANE:"''.002245
   1 "AN EXPERIMENT TO STUDY BOYLE'S  LAW PRODUCED THESE RESULTS:" 
   1 "ALTERNATIVELY A COIL OF WIDTH   'Y' MADE WITH 100 TURNS OF WIRE WOULD GIVE A MEAN DIAMETER OF:"
   1 "ALSO IN BOTH CASES A TEMPERATURERISE OF AT LEAST 30 K IS NEEDED FOR AN ACCURATE RESULT (1 MARK)."
   1 "AIR IN 100cm
   1 "ACETONYL AND ETHERONE ARE TWO   VERY INFLAMMABLE LIQUIDS 
   1 "A048072072048000000000000"
   1 "A STUDY WAS MADE OF OHM'S LAW   USING AN INACCURATE AMMETER.    THESE ARE THE RESULTS OBTAINED:"
   1 "A STUDY OF THE MINIMUM FORCE    REQUIRED TO MOVE A WOODEN BLOCK ON A RUBBER SURFACE WAS MADE    WITH THE FOLLOWING LOADS PLACED ON THE BLOCK:"
   1 "A SONOMETER SHOULD BE USED AS   SHOWN BELOW, (1 MARK). THE WIRE IS TENSIONED BY THE LOAD 'T',   PASSES OVER A SMALL PULLEY AND  THE VIBRATING LENGTH, l, IS SET BY TWO SUPPORTS.  THE WIRE IS   FINALLY SECURED TO THE SONOMETERBY A PEG."
   1 "A SIMPLE METHOD FOR TRACING RAYSTHROUGH A TRANSPARENT BLOCK IS  TO PLACE THE BLOCK IN THE CENTREOF THE SHEET OF PAPER AND MARK  ITS OUTLINE ON THE PAPER USING  THE PENCIL."
   1 "A SIMILAR PROCEDURE CAN BE USED TO FIND THE PROPORTION OF THE   ETHERONE IN THE MIXTURE.","(1 MARK)"
   1 "A PIN IS PLACED AT 'A', RIGHT   NEXT TO THE BLOCK AND ANOTHER   IS PLACED AT 'B', CLOSE TO THE  EDGE OF THE PAPER."
   1 "A MEASURED DISTANCE OF AT LEAST 1000 m SHOULD SEPARATE YOU FROM YOUR ASSISTANT. (2 MARKS)"
   1 "A DENSITY BOTTLE IS USED FOR THEMEASUREMENT OF LIQUID DENSITIES.THE VOLUME OF THE BOTTLE HAS    BEEN DETERMINED PREVIOUSY USING AIR-FREE WATER AS A STANDARD.   (3 MARKS)"
   1 "3. WORK OUT THE SLOPE (GRADIENT)   OF THE GRAPH."
   1 "3. WORK OUT THE GRADIENT (SLOPE)OF THE GRAPH AND CALCULATE THE  
   1 "3. THE REST IS ETHERONE THAT IS    (92-t)/39 = 25/39 = 0.64."
   1 "3. RECORD THE RISE IN VOLUME IN    THE CYLINDER. (1 MARK)"
   1 "3. PLACE THE STONE IN THE BEAKER   FULL OF LIQUID, REMOVE THE      OVERFLOW, WEIGH AGAIN AND       NOTE THE MASS (M3). (4 MARKS)"
   1 "3. DIVIDING THE RESULT IN 2. BY    THE RESULT IN 1. GIVES THE      PROPORTION SOUGHT.  (2 MARKS)",,,,
   1 "3. DIVIDING THE DIFFERENCE IN      2. BY THE DIFFERENCE IN 1.      TO FIND THE PROPORTION OF       ACETONYL IN THE MIXTURE.","   (2 MARKS)" 
   1 "3.  THE DENSITY OF THE LIQUID IS    CALCULATED BY DIVIDING ITS      MASS BY THE VOLUME OF THE       BOTTLE.  (1 MARK)"
   1 "2. WEIGH THE BEAKER COMPLETELY     FULL OF LIQUID AND RECORD ITS   MASS (M2)."
   1 "2. THEN ADD A KNOWN MASS OF SAND   PREVIOUSLY WEIGHED ON THE       BALANCE. (2 MARKS)"
   1 "2. THE PROPORTION OF ACETONYL IS   (t-53)/39 = 14/39 = 0.36."
   1 "2. SUBTRACTING THE RATE OF RISE    OF TEMPERATURE OF THE MIXTURE   FROM THAT OF ACETONE (1 MARK)" 
   1 "2. SUBTRACTING THE BOILING POINT   OF ACETONYL (53
   1 "2. FROM THE GRAPH FIND THE VALUE   OF THE FORCE NEEDED TO MOVE     THE WOODEN BLOCK ON ITS OWN     (THE ZERO-LOAD FORCE)"
   1 "2. FIND THE INTERCEPT ON THE    HORIZONTAL AXIS WHEN THE VALUE  OF 1/I IS ZERO."
   1 "2. DEDUCE AN ACCURATE VALUE FOR    THE MAXIMUM SAFE LOADING OF     THE SPRING.     (14 MARKS)";
   1 "2.  DIVIDING THE RESULT BY THE      DENSITY RANGE, i.e. THE         DIFFERENCE IN DENSITY OF        THE TWO LIQUIDS.  (2 MARKS)"
   1 "100 SQUARES MADE A PILE 22.5 mm HIGH.":
   1 "1/I   = 0.29 0.38 0.56 0.65 0.80"
   1 "1.10 TO 1.20 cm/N ... 1 MARK"
   1 "1. THE RATE OF LOSS OF HEAT FROM   THE RODS IN ITSELF CAN AFFECT   THE RESULT OF THE COMPARISON.   (2 MARKS)"'"2. THE SAME LOSS OF HEAT LIMITS    THE LENGTH OF THE RODS SINCE    TOO GREAT A LENGTH WILL NOT     LET THE TEMPERATURE AT THE      ENDS RISE ENOUGH TO MELT THE    WAX. (2 MARKS)"
   1 "1. THE DIFFERENCE IN THE b.pts.    OF THE PURE LIQUIDS IS 39
   1 "1. TAKING THE DIFFERNCE IN b.pt.   OF THE TWO LIQUIDS (39
   1 "1. TAKING THE DIFFERENCE IN THE    HEATING RATE OF THE TWO PURE    LIQUIDS (1 MARK)."
   1 "1. PLOT A GRAPH OF LOAD (X-AXIS)   AGAINST FORCE (Y-AXIS)."
   1 "1. PLOT A GRAPH HAVING VALUES   OF 1/I AS THE VERTICAL AXIS
   1 "1. FIND THE GRADIENT (SLOPE) OF    THE LINE."
   1 "1.  THE BOTTLE IS RINSED, FILLED    WITH THE LIQUID AND WEIGHED.    (2 MARKS)",,"2.  THE MASS OF THE EMPTY BOTTLE    IS THEN SUBTRACTED FROM THE     TOTAL MASS TO GET THE MASS      OF THE LIQUID.  (1 MARK)"
   1 "1.  SUBTRACTING THE DENSITY OF      PROPANOL (0.8044) FROM THE      DENSITY OF THE MIXTURE.         (2 MARKS)"
   1 "(4 MARKS)";
   1 "(4 MARKS)"
   1 "(3 MARKS)"
   1 "(16 MARKS)";
   1 "(15 MARKS)";
   1 "(14 MARKS)":
   1 "(13 MARKS)";
   1 "(12 MARKS)"
   1 "(";Dm;"-804.4)/(998.2-804.4)","= ";RAT;"00"'"(3 MARKS)";
   1 "'"(1 MARK)"
   1 "'"       
   1 "  0.2245*";WB;"/(";WA;"+";WB;") = ";.002245
   1 "   (2 MARKS)":
   1 "   (14 MARKS)";
   1 "      e.m.f. = 1/(GRADIENT)",,,"(16 MARKS)"
   1  WHICH WOULD"'"LET 4 A PASS"'"(2 MARKS)"
   1  VOLUME OF DRY SAND     =100 cm
   1  THEN  THE EQUATION CHANGES TO:"
   1  RESISTORS."
   1  OF SAND  = 35 cm
   1  OF  SAND." 
   1  HOMESTUDY LTD."''"      M.J.Rickards, M.Sc."
   1  AS THE VERTICAL AXISAND DRAW THE BEST STRAIGHT LINE YOU CAN THROUGH THE POINTS. ";
   1  AND WATER,     DESCRIBE HOW YOU WOULD MEASURE  THE DENSITY OF THE SAND. MENTIONFACTORS WHICH WOULD INFLUENCE   THE ACCURACY OF YOUR RESULTS." 
   1  AND THE MASS IN g."'"(4 MARKS)"
   1  AND   MULTIPLIED BY 6.  THE CUBE ROOT OF THIS FIGURE GIVES THE MEAN   DIAMETER SOUGHT."
   1  9.9   4"'"    10.0
   1  9.6   3"'"     9.7
   1  9.3   2"'"     9.4
   1  8.9   1"'"     9.0
   1  2.21 m ...1 MARK      2.22      2.27 m ...2 MARKS     2.28      2.31 m ...3 MARKS     2.32      2.36 m ...4 MARKS     2.37      2.40 m ...3 MARKS     2.41      2.46 m ...2 MARKS     2.47      2.54 m ...1 MARK"
   1  1.25        1"
   1  1.10        2"'"  1.11 
   1  0.89        1"'"  0.90 
   1  .....3 MARKS     1.81    2.00 
   1  .....2 MARKS     2.01    2.15 
   1  .....2 MARKS     1.56    1.80 
   1  .....1 MARK"
   1  .....1 MARK      1.40    1.54 
   1  (4 MARKS)"
   1   AND THE DIAMETER OF A SPHERE IS GIVEN BY:"
   1   (14 MARKS)";