UNIZIK Physics 2010/2011 Day 2 Past Questions

Which of the following physical processes cannot be explained by the molecular theory of matter?

A spring balance, which is suspended from the roof of a lift, carries a mass 1kg at its free end. If the lift accelerates upwards at 2.5ms^-2, determine the reading on the spring balance (g = 10m/s²).

An object of weight 10N immersed in a liquid displaces a quantity of the liquid. If the liquid displaced weighs 6N, determine the upthrust on the object.

A block weighing 15N rests on a flat surface and a horizontal force of 3N is exerted on it. Determine the fractional force on the block.

The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. (Density of water = 1000gm-3, g = 10ms^-2)

The resistance of a wire depends on

Which of the following is a correct explanation of the inertia of a body?

A device that converts sound energy into electrical energy is

What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per KWh?

Which of the following is NOT a fundamental S.I. unit?

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

Which of the following phenomena cannot be explained by the molecular theory of matter?

In a gas experiment, the pressure of the gas is plotted against the reciprocal of the volume of the gas at a constant temperature. The unit of the slope of the resulting curve is

Water shows anomalous behaviour

A heavy object is suspended from a string and lowered into water so that it is completely d submerged. The object appears lighter because

Which of the following is a derived unit?

A dentist obtains a linear magnification of 4 of a hole in a tooth by placing a concave mirror at a distance of 2.0cm from the tooth. The radius of curvature of the mirror is

What is the effect of the increase in the size of the hole of a pin-hole camera on the image? It

The mechanical advantages of an inclined plane depends on

A man walks 8km north and then 5km in a direction 60° east of north. Find the distance from his starting point.