Free CXC Physics Paper 2 May/June 2014 past paper from 2014. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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CSEC Physics Paper 2 May/June 2014 - Free CXC Past Paper with Answers
Free CXC Physics Paper 2 May/June 2014 past paper from 2014. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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Every question from this paper as text. See the answers and worked solutions. Questions are the property of the Caribbean Examinations Council; Caribbean AI is not affiliated with CXC.
A Form Four class was given a School-Based Assessment activity on the change of phase of a substance while it is cooling. The class presented the results shown in Table 1.
TABLE 1
| Temperature, | 90.0 | 74.5 | 70.0 | 70.0 | 70.0 | 70.0 | 65.0 | 57.5 |
|---|---|---|---|---|---|---|---|---|
| Time, /mins | 0.0 | 5.0 |
| 10.0 |
| 15.0 |
| 20.0 |
| 25.0 |
| 30.0 |
| 35.0 |
| Point on graph | A | B | C | D |
[Specific Heat Capacity of Substance = ] [Specific Latent Heat of Fusion of Substance = ]
Complete Table 2 to show the symbols and SI units for the physical quantities given.
TABLE 2
| Physical Quantity | Symbol | SI Unit |
|---|---|---|
| Heat Capacity | ||
| Specific Latent Heat of Vapourisation |
[25 marks]
Plot, on page 3, a graph of Temperature () versus Time (/mins). Begin both axes at the origin and insert the letters A, B, C and D on the graph.
[7 marks]
Using a dotted line on the graph, determine the melting point of the substance that was heated.
[2 marks]
In what state is the substance as it moves between points B and C?
[1 mark]
Explain why the temperature was constant between B and C.
[1 mark]
State the phase of the substance at C.
[1 mark]
Describe what is happening to the substance between C and D.
[1 mark]
If 15 g of the substance was cooled from to , calculate the heat, in kilojoules, which was lost in this activity.
[Specific Heat Capacity of Substance = ] [Specific Latent Heat of Fusion of Substance = ]
[8 marks]
Complete Table 2 to show the symbols and SI units for the physical quantities given.
TABLE 2
| Physical Quantity | Symbol | SI Unit |
|---|---|---|
| Heat Capacity | ||
| Specific Latent Heat of Vapourisation |
[4 marks]
The unit of energy, the Joule, has two equivalent derived units.
The unit of energy, the Joule, has two equivalent derived units.
In Figure 1, indicate in the bubbles, two equivalent derived units for the Joule.
Figure 1. [Image: Diagram showing "Joule" in a central bubble connected to two empty bubbles labelled "Equivalent Derived Unit"]
[2 marks]
Solar energy is one of the popular alternative sources of energy. State ONE application of solar energy.
[1 mark]
State ONE advantage of using solar energy in the Caribbean.
[1 mark]
A 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.
TABLE 3
| Alternative Energy | Source |
|---|---|
| (1) | |
| (2) | |
| (3) |
[3 marks]
A basketball of mass was dropped vertically from rest at A, from the ground as seen in Figure 2. Calculate the
Figure 2. [Image: Diagram of a house with a basketball at point A, 12m above point B on the ground]
gravitational potential energy of the ball at the point of release, A.
[3 marks]
final velocity of the ball on reaching the ground later (assume no loss of energy as the ball falls).
[3 marks]
ball's momentum when it hits the ground.
[Acceleration due to gravity, ]
[2 marks]
State the equation for the general gas law for an ideal gas.
[1 mark]
State the meaning of EACH symbol stated in the equation in (a) (i).
[4 marks]
A car tyre is pumped to a pressure of in the morning when the temperature is . Later in the day, the temperature rises to . Calculate the new pressure in the tyre. The volume of air is kept constant.
[5 marks]
Using the kinetic theory of matter, explain why the increase in pressure occurred.
[2 marks]
Calculate the ratio of new volume to old volume for the tyre, if the pressure is held constant while the temperature rises from to .
Write your answer to Question 4 here.
[15 marks]
State the laws of refraction.
[6 marks]
Figure 3 shows the clown fish, Nemo, looking at point B. It sees the fisherman's net appearing as if it were at A.
Nemo swims away and his eye is now a horizontal distance of 5 metres from point B. Looking at point B he no longer sees the net but now sees Bruce, the shark.
If Bruce is at the same depth as Nemo, how far away is Bruce's eye from Nemo's eye. Explain your result.
[9 marks]
Calculate angle c, given that angle ABD is .
[3 marks]
Given that angle c is the critical angle for the air–water boundary, calculate the refractive index of the water.
[3 marks]
Nemo swims away and his eye is now a horizontal distance of 5 metres from point B. Looking at point B he no longer sees the net but now sees Bruce, the shark.
If Bruce is at the same depth as Nemo, how far away is Bruce's eye from Nemo's eye. Explain your result.
[3 marks]
Write your answer to Question 5 here.
[15 marks]
Climate change is a major issue facing the global community. The average person can make a positive difference by conserving existing energy sources. Describe THREE ways in which this can be done. State clearly what form of energy is conserved in EACH case.
[6 marks]
Home owner, Rasheed, is going on a two-week vacation. He has decided to leave on a 60W incandescent light bulb for security reasons.
[9 marks]
Calculate the total energy in kWh that the bulb will consume during the two-week period.
[4 marks]
Given that Rasheed's electricity rate is $0.26 per kWh, calculate his electricity charges for the bulb for the two weeks.
[1 mark]
During the two-week period, 15.5 kWh of energy was lost as heat from the bulb. Determine the efficiency of the bulb.
[4 marks]
In 20 days, the activity of a sample of Bismuth decreases to one-sixteenth of its original activity.
[6 marks]
Define the term 'half-life'.
[2 marks]
Calculate the half-life of Bismuth.
[4 marks]
Radioisotopes have many useful applications, but overexposure is a health hazard.
State TWO useful applications of radioisotopes and TWO precautions to be taken when handling radioisotopes.
[4 marks]
During the fission of 1 kg of Uranium –235, J of energy is released and there is a change in its mass.
Calculate the new mass. []
Write your answer to Question 6 here.
[5 marks]
[3 marks]