CSEC Physics · May/June 2014 · 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)7 marksPlot, on page 3, a graph of Temperature (θ/°C) versus Time (t/mins). Begin both axes at the origin and insert the letters A, B, C and D on the graph.
2. 1(b)2 marksUsing a dotted line on the graph, determine the melting point of the substance that was heated.
3. 1(c)(i)1 markIn what state is the substance as it moves between points B and C?
4. 1(c)(ii)1 markExplain why the temperature was constant between B and C.
5. 1(d)(i)1 markState the phase of the substance at C.
6. 1(d)(ii)1 markDescribe what is happening to the substance between C and D.
7. 1(e)8 marksIf 15 g of the substance was cooled from 90.0°C to 57.5°C, calculate the heat, in kilojoules, which was lost in this activity. [Specific Heat Capacity of Substance = 1763 Jkg⁻¹ K⁻¹ ] [Specific Latent Heat of Fusion of…
8. 1(f)4 marksComplete Table 2 to show the symbols and SI units for the physical quantities given.
9. 2(a)(i)2 marksIn Figure 1, indicate inside the bubbles, two equivalent derived units for the Joule.
10. 2(a)(ii)1 markSolar energy is one of the popular alternative sources of energy. State ONE application of solar energy.
11. 2(a)(iii)1 markState ONE advantage of using solar energy in the Caribbean.
12. 2(a)(iv)3 marksA variety of alternative energy technologies are being used in the Caribbean and globally. Other than solar energy, complete Table 3 to show three other types of alternative energy technologies and their sources.
13. 2(b)(i)3 marksCalculate the gravitational potential energy of the ball at the point of release, A.
14. 2(b)(ii)3 marksCalculate the final velocity of the ball on reaching the ground 1.56 seconds later (assume no loss of energy as the ball falls).
15. 2(b)(iii)2 marksCalculate the ball's momentum when it hits the ground. [Acceleration due to gravity, g, = 9.8 m s⁻²]
16. 3(a)(i)1 markState the equation for the general gas law for an ideal gas.
17. 3(a)(ii)4 marksState the meaning of EACH symbol stated in the equation in (a) (i).
18. 3(b)(i)5 marksCalculate the new pressure in the tyre. The volume of air is kept constant.
19. 3(b)(ii)2 marksUsing the kinetic theory of matter, explain why the increase in pressure occurred.
20. 3(b)(iii)3 marksCalculate the ratio of new volume to old volume (V₂/V₁) for the tyre, if the pressure is held constant while the temperature rises from 23°C to 34°C.
21. 4(a)6 marksState the laws of refraction.
22. 4(b)(i)3 marksCalculate angle c, given that angle ABD is 42°.
23. 4(b)(ii)3 marksGiven that angle c is the critical angle for the air-water boundary, calculate the refractive index of the water.
24. 4(b)(iii)3 marksIf Bruce is at the same depth as Nemo, how far away is Bruce's eye from Nemo's eye. Explain your result.
25. 5(a)6 marksDescribe THREE ways in which this can be done. State clearly what form of energy is conserved in EACH case.
26. 5(b)(i)4 marksCalculate the total energy in kW h that the bulb will consume during the two-week period.
27. 5(b)(ii)1 markGiven that Rasheed's electricity rate is $0.26 per kWh, calculate his electricity charges for the bulb for the two weeks.
28. 5(b)(iii)4 marksDuring the two-week period, 15.5 kWh of energy was lost as heat from the bulb. Determine the efficiency of the bulb.
29. 6(a)(i)2 marksDefine the term 'half-life'.
30. 6(a)(ii)4 marksCalculate the half-life of Bismuth.
31. 6(b)4 marksState TWO useful applications of radioisotopes and TWO precautions to be taken when handling radioisotopes.
32. 6(c)5 marksCalculate the new mass. [c = 3 × 10⁸ m s⁻¹]