CSEC Physics · 1988 · Paper 2

32 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)4 marksOn the axes provided, sketch a velocity-time graph to illustrate the girl's journey.
2. 1(b)3 marksFind the initial acceleration and the final deceleration of the girl.
3. 1(c)3 marksHow far did the girl travel?
4. 1(d)3 marksWhat was the average velocity for the first 10 seconds of the journey?
5. 1(e)4 marksIn the space provided, sketch the displacement-time graph for the whole journey.
6. 1(f)3 marksIf the mass of the girl and the bicycle is 80 kg, how much useful work does she do in reaching a velocity of 10 m s⁻¹?
7. 2(a)6 marksState and explain THREE features of the design which could reduce the amount of solar radiation entering the building during the day and hence reduce cooling costs.
8. 2(b)4 marksExplain how an air-conditioner is able to transfer thermal energy from the room to the outside, referring to the evaporation and condensation cycle shown in the diagram.
9. 2(c)4 marksThe heat capacity of a room is 3 × 10⁴ J K⁻¹. The room is cooled by an air-conditioner extracting heat at a rate of 500 W. By how much will the temperature of the room fall in five minutes?
10. 2(d)6 marksArchitects quote the power of air-conditioning systems in 'ton' of air-conditioning, where 1 'ton' extracts the same amount of heat in 1 day as 1 ton of ice would need to melt at its normal melting point. Using the data…
11. 3(a)(i)3 marksIdentify the components X, Y and Z labelled in the diagram.
12. 3(a)(ii)3 marksState whether or not the atom is neutral and explain your answer. Then record the mass (nucleon) number of the atom.
13. 3(a)(iii)3 marksDraw a similar diagram to represent an isotope of the atom in (ii), and record its mass (nucleon) number.
14. 3(b)(i)4 marksEnter, above each arrow, the symbols for the radiations that are likely to be emitted.
15. 3(b)(ii)3 marksIf someone is exposed to all three radiations from the thorium source, which one do you think is most likely to cause the greatest harm? Explain your answer.
16. 3(b)(iii)2 marksCalculate the half-life of a radioactive substance whose activity falls to 25% in 10 hours.
17. 3(b)(iv)2 marksThe activity of a substance falls from 3 000 Bq to 750 Bq in 10 hours. What is its activity after a further fifteen hours?
18. 4(a)2 marksState the MAIN differences between the magnetic properties of iron and steel.
19. 4(b)(i)2 marksIdentify the components A and B.
20. 4(b)(ii)6 marksDescribe clearly the function of EACH of the components X, Y and Z.
21. 4(c)(i)5 marksState what is wrong with the circuit, what the ammeter reading would be, and what the voltmeter reading would be.
22. 4(c)(ii)2 marksRedraw the circuit as it should have been connected to measure the resistance of Rx.
23. 4(c)(iii)3 marksIf the current through Rx when the circuit is correctly wired is 0.16 A, what is the voltmeter reading?
24. 5(a)(i)2 marksDescribe the motion of the source S and state its frequency.
25. 5(a)(ii)2 marksWith reference to the diagram, write TWO statements describing the motion and frequency of a particle, P, of the medium (water).
26. 5(a)(iii)2 marksCalculate the velocity of the travelling wave.
27. 5(a)(iv)2 marksState TWO differences between travelling and standing waves.
28. 5(a)(v)1 markWith reference to the diagram, mention ONE step that could be taken to obtain a standing wave from the travelling ripples in the trough.
29. 5(b)(i)2 marksCalculate the wavelength in shallow water.
30. 5(b)(ii)3 marksComplete the diagram to show the refracted wave fronts with their correct separation.
31. 5(b)(iii)3 marksCalculate the value of ϕ, the angle of refraction of the waves.
32. 5(b)(iv)3 marksCalculate the velocity of the wave fronts in shallow water if the velocity in deep water is 4 cm s⁻¹.