CSEC Physics Paper 2 May/June 2012 - Free CXC Past Paper with Answers

Complete Table 2 which relates the physical quantities and their derived SI units.

TABLE 2

Complete Table 2 which relates the physical quantities and their derived SI units.

TABLE 2

State TWO fundamental quantities and their corresponding SI units.

Calculate the density of gasoline which occupies $150\ \text{cm}^3$ of space and has a mass of $102\ \text{g}$.

If $325\ \text{g}$ of mercury of density $13.6\ \text{gcm}^{-3}$ occupies a certain space, determine the volume of the space.

Calculate the relative density of gasoline using the density of mercury as the base quantity for the comparison.

Determine its weight in air.

[Acceleration due to gravity, $g = 10 \text{ N Kg}^{-1}$]

For land transport, the yacht is secured on a trailer. Each tyre on the trailer can support up to a maximum of $7000 \text{ Newtons}$. What is the LEAST number of tyres the trailer should have to support the yacht adequately?

Many forces act on the yacht yet it is in equilibrium. State TWO conditions that must be satisfied for an object to be in equilibrium.

State the effect that the position of the centre of gravity of an object has on its stability.

State Archimedes' Principle.

The yacht's hull is made of steel with density, $\rho_s$, equal $7850 \text{ kg m}^{-3}$. Explain how the yacht is able to float in sea water of density, $\rho_{sw} 1025 \text{ kg m}^{-3}$.

Calculate the volume of sea water displaced by the yacht as it floats.

Experiments into the fundamental nature of matter are being carried out at particle accelerator facilities. A hundred years ago, Geiger and Marsden performed the now famous gold – foil experiment at the suggestion of Rutherford.

Describe this experiment and explain how it established the nuclear structure of the atom.

One type of reaction in a nuclear reactor involves the bombarding of an Uranium atom ($^{235}_{92} \text{U}$) with a neutron. In the process, Krypton ($\text{Kr}$) and Barium ($\text{Ba}$) are created along with the release of 2 neutrons and energy. The incomplete equation for this reaction is:

$^{235}_{92} \text{U} + ^{1}_{0} \text{n} \rightarrow ^{144}_{56} \text{Ba} + 2 \text{ }^{1}_{0} \text{n} + \text{energy}$

Rewrite and complete the nuclear equation for this process.

Table 3 below gives atomic mass data for nuclides.

TABLE 3

State the equation for the General Gas Law.

A little girl blew up a balloon during a Christmas celebration. Explain, in terms of the kinetic theory, how pressure is exerted by the air in the balloon.

A block of ice of mass $2000 \text{ g}$ was heated from $0 \text{ }^\circ\text{C}$ to steam at $100 \text{ }^\circ\text{C}$. Calculate the energy used in Joules.

If the activity at (b) (i) took place in $6000 \text{ s}$, how much power was utilized?

[ Specific latent heat of vaporization of steam $= 2 \text{ }250 \text{ }000 \text{ J Kg}^{-1}$ Specific latent heat of fusion of ice $= 330 \text{ }000 \text{ J Kg}^{-1}$ Specific heat capacity of water ]

Outline THREE differences between 'light waves' and 'sound waves'.

Electromagnetic waves have many properties. Write a paragraph describing at least THREE properties not referred to in Part (a) (i).

Carl and his friend Tommy were doing a School-Based Assessment on estimating the speed of sound in air using an echo method.

Carl stands 100 m from a wall. Carl claps two wooden blocks to produce a series of echoes and Tommy who was standing beside him starts his stop watch. After 1 echo Tommy stops the watch. This process is repeated and the time for 50 echoes was calculated to be 30.3 s.

Calculate the speed of the sound generated.

A popular radio station broadcasts with a frequency of $100 \times 10^6$ Hz.

Calculate, in centimetres, the wavelength of the sound waves generated.

$[ \text{Speed of radio waves} = 3.0 \times 10^8 \text{ m s}^{-1} ]$