UNIPORT Physics 2009/2010 Past Questions

A weight of 100 grams hangs from a lever 20cm to the right of the fulcrum. At the left is a 500 gram weight 20cm from the fulcrum and a 200 gram. What is the value of x that will make the lever balanced?

What is the relative permittivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads.

If the magnification of a virtual image formed of an object 10cm from a convex lens is 3cm. then the focal length of thee lens is

If a water pump at Kainji Dam is capable of lifting 1000kg of water through a vertical height of 10m in 10s, the power of thee pump is (g = 10m/s²)

A simple pendulum with a period of 2.0s has its length doubled. Its new period is

In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500m/s, what is the depth of the sea?

A uniform cylindrical block of wood floats in water with one-third of its height above the water level. In a liquid of relative density 0.8. what reaction of its height will be above the liquid level?

The resistance of a platinum wire at the ice and steam point are 0.75Ω and 1.005Ω respectively. Determine the temperature at which the resistance of the wire is 0.90Ω

The electrochemical equivalent of platinum is 5.0 × 10^-7kg/c. to plate-out 1.0kg of platinum, a current of 100A must be passed through as appropriate vessel for

How many grams of water at 17°C must be added to 42kg of ice at 0°C to melt the ice completely