A faulty thermometer registers 102.5^oC t 100^oC. If the thermometer has no zero hour, what will it register at 55^oC?

• A. 54.6^oC
• B. 55.0^oC
• C. 56.0^oC
• D. 56.4^oC

Which of the following waves is not transverse

• A. light waves
• B. sound waves
• C. sea waves
• D. radio waves

A rod of initial lenght 2m at a temperature of 25^oC is heated to 80^oC. Calculate the increase in length of the rod if its linear expansivity is 4.0 x 10^-3K^-1

• A. 0.26m
• B. 0.44m
• C. 0.53m
• D. 0.84m

Which of the following factors affect the rate of evaporation of a liquid? i. Exposed surface area ii Temperature of the surroundings iii. Thermal capacity of the liquid iv. Relative humidity of the surroundings

• A. ii and iii only
• B. ii, iii and iv only
• C. i, iii and iv only
• D. i, ii and iv only

Explain the following terms:

(a) tensile stress;

(b)Young’s modulus

As a bicycle Tyre was being pumped up, it was noticed that contrary to Boyle's law the volume increased as the pressure increased. The best explanation of this is that Boyle's law is only true for

• A. ideal gases
• B. a fixed mass of gas
• C. a mixture of gases
• D. a gas at variable temperature

A particle is projected horizontally at 15ms\(^{-1}\) from a height of 20m.

Calculate the horizontal distance covered by the particle just before hitting the ground.

[g = 10 ms\(^{-2}\)]

When table salt is added to ice, the melting point of the ice

• A. is raised
• B. is lowered
• C. remains unchanged
• D. is first raised, then lowered

If the direction of the curent in a straight wire is reversed, the magnetic field

• A. remains the same
• B. becomes parallel to the wire
• C. ceases to exist
• D. is oppositely directed

The period of a simple pendulum of length 80.0cm was found to have doubled when the length of the pendulum was increased by X. Calculate X.

• A. 26.7cm
• B. 40.0cm
• C. 160.0cm
• D. 240.0cm