CSEC Physics · 1998 · Paper 2

36 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)1 markExplain how you would ensure that the temperature of the gas remains constant during the experiment.
2. 1(b)9 marksGiven the relationship 1/V = k * P, read off values of V from the graph at the specified pressures to complete Table 1, and calculate the corresponding values of 1/V.
3. 1(c)8 marksPlot a graph of 1/V against P on the grid provided on page 5.
4. 1(d)2 marksState what conclusion can be drawn from the plotted graph, giving a reason for your answer.
5. 1(e)5 marksGiven that the gradient of the graph equals the value of k, calculate k.
6. 1(f)(i)3 marksCalculate the volume of the air in the tube if the pressure is increased to 550 kPa, assuming 1/V = k * P applies.
7. 1(f)(ii)2 marksCalculate the pressure of the air when its volume is at its maximum of 65 cm^3.
8. 2(a)(i)2 marksIf the polythene rod is attracted, state TWO possible conclusions that might be drawn.
9. 2(a)(ii)1 markState the conclusion that could be drawn if the rods repelled each other.
10. 2(b)(i)1 markMark on Figure 3 the direction of conventional current flow.
11. 2(b)(ii)1 markIdentify what kind of charge actually moves in the wire.
12. 2(b)(iii)1 markState the direction in which the charges move (from which sphere to which sphere).
13. 2(b)(iv)2 marksState the SI unit of electric charge and give its definition.
14. 2(b)(v)4 marksCalculate how much charge is transferred through the wire if a current of 3 µA flows for 2 ms.
15. 2(c)3 marksCalculate the charge stored in a 40 amp-hour battery using the SI unit for charge.
16. 3(a)5 marksComplete Table 2 by filling in the missing wave types, sources, and whether each is transverse or longitudinal.
17. 3(b)3 marksFigure 4 shows circular wavefronts spreading from source S and incident on a flat barrier. Draw TWO reflected wavefronts and mark with an 'X' the point from which they appear to originate.
18. 3(c)(i)1 markUse the graph in Figure 5 to determine the amplitude of the wave.
19. 3(c)(ii)1 markDetermine the time taken for one complete cycle of the wave.
20. 3(c)(iii)2 marksCalculate the frequency of the wave.
21. 3(c)(iv)1 markState what other information is needed to calculate the wavelength of the wave.
22. 3(c)(v)2 marksOn Figure 5, sketch another wave that has the SAME amplitude but HALF the frequency.
23. 4(a)2 marksDescribe how a radioactive isotope is used as a tracer in the human body.
24. 4(b)2 marksGive TWO reasons why nuclei that emit only alpha-particles are NOT normally used as medical tracers in the human body.
25. 4(c)(i)1 markExplain what is meant by the half-life of an isotope.
26. 4(c)(ii)2 marksGive the symbol for another possible isotope of iodine.
27. 4(c)(iii)2 marksExplain why a half-life of 8 days is suitable for medical uses compared to available isotopes with half-lives of 20 seconds and 2 years.
28. 4(c)(iv)3 marksCalculate after how many days 7/8 of a sample of 131_53 I will have decayed.
29. 4(d)2 marksWrite a balanced nuclear equation for the decay of 131_53 I into xenon (Xe), emitting a beta-particle and gamma-radiation.
30. 5(a)2 marksState Archimedes' principle.
31. 5(b)2 marksIn terms of the forces acting on each object, explain why a tree floats in water while a nail sinks, even though the tree is much heavier.
32. 5(c)(i)3 marksUse the readings from Figure 6 to find the volume of the rock in cm^3.
33. 5(c)(ii)1 markState the volume of the rock in m^3 (given 1 m^3 = 1 x 10^6 cm^3).
34. 5(c)(iii)3 marksGiven the rock has a mass of 0.12 kg, find its density in kg m^-3.
35. 5(c)(iv)2 marksDetermine whether the rock would float or sink in bromoform (density 4000 kg m^-3). Explain your answer.
36. 5(d)3 marksState what change, if any, occurs in the mass, weight, and density of a piece of rock taken from the Moon to the Earth.