CSEC Physics Paper 2 May/June 2017 - Free CXC Past Paper with Answers

Distinguish between 'transverse' and 'longitudinal' waves.

State ONE example each of transverse and longitudinal waves.

Example of transverse wave: Example of longitudinal wave:

In the wave equation, velocity ($v$), frequency ($f$) and wavelength ($\lambda$) are related. Write the equation.

A wave motion has a frequency of 10 Hz and a wavelength of 250 m. Calculate the speed of the wave.

Figure 4 shows a sinusoidal wave.

Using Figure 4, determine the wave's (i) amplitude (in metres) (ii) period (in seconds) (iii) frequency (in hertz).

Indicate on Figure 4 the amplitude of the wave.

amplitude (in metres)

frequency (in hertz).

frequency (in hertz).

State ONE property of an electromagnetic wave.

Elements with unstable nuclei are susceptible to decay.

What is meant by the term 'nuclear fission'?

State TWO advantages of utilizing nuclear energy.

Workers in nuclear power plants need to be extra careful on the job.

State ONE precaution that workers in nuclear power plants need to take.

Give TWO disadvantages of using nuclear reactors to generate energy.

Uranium isotope U-238 undergoes nuclear fission when struck by a neutron. Barium-139 and krypton-97 nuclei are emitted along with three neutrons as shown in the following equation:

$_{92}^{238}U + _{0}^{1}n \longrightarrow _{p}^{139}Ba + _{36}^{97}Kr + 3 \ _{0}^{1}n$

State the value of $p$.

State the meaning of '$c$' in Einstein's equation $\Delta E = \Delta mc^2$.

Calculate the total mass of the elements formed after the reaction.

Calculate the energy released in the reaction.

State ONE use of the energy released from the reaction.

For a popular amusement park ride, patrons board a carriage at the top of a high tower and are subjected to a wild ride of 'terror'.

Name and state the Newton's Law which applies if the

carriage is moving horizontally at a constant speed in a straight line

carriage is in free fall.

Calculate the length of time that the carriage in Part (a) on page 14 is allowed to free fall if it reaches a speed of $64.8 \text{ km h}^{-1}$ from rest. [Use $g = 10 \text{ ms}^{-2}$]

Determine the distance the carriage falls in (b) (i).

Four factors of the surface of a material on which the absorption and emission of radiation depend are:

• Texture (rough or smooth)
• Nature (dull or shiny)
• Colour (black or white)
• Area (large or small)

State, with a reason, the appropriate characteristics of TWO of the above factors in the design of (i) a car radiator (ii) the roof of a Caribbean home.

a car radiator

the roof of a Caribbean home.

The following data were obtained in an experiment using an immersion heater to determine the specific latent heat of vaporization of water.

• Mass of can and water at start of boiling $m_1 = 0.28 \text{ kg}$
• Mass of can and water at end of boiling $m_2 = 0.26 \text{ kg}$
• Power of heater $= 150 \text{ W}$
• Time of heating $= 5 \text{ minutes}$

(i) Using the data above, calculate the specific latent heat of vaporization of water, assuming negligible heat is lost to the surroundings. (ii) The coil of the immersion heater was NOT completely submerged. Explain how this would have affected the value for the specific latent heat of vaporization obtained in (b) (i) on page 17.

Using the data above, calculate the specific latent heat of vaporization of water, assuming negligible heat is lost to the surroundings.

The coil of the immersion heater was NOT completely submerged. Explain how this would have affected the value for the specific latent heat of vaporization obtained in (b) (i) on page 17.

Using fully labelled diagrams, define the principal focus of (i) a converging lens (ii) a diverging lens.

a converging lens

a diverging lens.

An object of height $7.2 \text{ cm}$ is placed $18.0 \text{ cm}$ from a converging lens of focal length $12.0 \text{ cm}$. Determine (i) the image distance (ii) the magnification (iii) the height of the image formed (iv) whether the image formed is real or virtual.

the image distance

the magnification

the height of the image formed

whether the image formed is real or virtual.