State three properties of a semiconductor.

Molecules move in random motion within a liquid. The total internal energy of the liquid depends on all of the following except its?

• A. temperature
• B. mass
• C. specific heat capacity
• D. melting point

The diagram below shows a velocity time graph representing the motion of a car. Find the total distance covered during the acceleration and retardation of the motion

• A. 75m
• B. 150m
• C. 300m
• D. 375m

An elastic string of force constant 200N m^-1 is stretched through 0.8m within its elastic limit. Calculate the energy stored in the string

• A. 64.0J
• B. 80.0J
• C. 128.0J
• D. 160.0J

Thermal equilibrium between two object exist when

• A. the temperature of both objects are equal
• B. the quantity of heat of both objects is the same
• C. the heat capacities of both objects are the same
• D. one object losses heat continuously to the other

The inability of the eye to focus near objects is known as

• A. Long sight
• B. Astigmatism
• C. Presbyopia
• D. Glaucoma

A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is?

• A) 15/16
• B) 1/16
• C) 3/4
• D) 1/4

a) Define the term surface tension

(b) Calculate the force required to lift a needle 4cm long off the surface of water if the surface tension of water is 7.3 x 10\(^{-4}\) NM\(^{-1}\)

Which of the following is not an example of a force?

• A. Tension
• B. Weight
• C. Friction
• D. Mass

In the diagram shown, which of the simple pendulum will resonate with P when set into oscillation?

• A. U
• B. T
• C. R and T
• D. Q and R