Question Library

Two balls of equal mass moving with a relative speed of 25 ms\(^{-1}\) in opposite directions collide. If one of the balls stopped immediately after their collision and the other had a final momentum of 15 kg ms\(^{-1}\), what is the mass of each ball?

What buoyant force is experienced by an object that is partially immersed in a liquid of density 920 kg m\(^{−3}\) and displacing 4.5 × 10\(^{−2}\) m\(^3\) of the volume of it?

The ideal gas equation is satisfactory at the variables of a

Which of the following instruments uses the difference in temperature as a measure of the relative humidity?

What is the equivalent of 780 K in the Fahrenheit scale?

The heat absorbed by a 2.4 m\(^2\) of a brick oven whose temperature gradient is 400 K m\(^{−1}\) in 2 hours is [k = 0.85 W m\(^{−1}\)K\(^{−1}\)]

What amount of heat energy can cause 16kg of dried ice to melt completely? Assuming no heat was lost to the surroundings. (L = 336 J kg\(^{−1}\))

Location P Q R S Relative humidity(%) 0 50 80 100 From the above table, which location is it likely to rain?

Which of the following is not an application of capillarity?

What happens if the dew point of air is further reduced?

A horse shoe magnet is an example of

From the diagram above, current X is

Using the circuit above as a guide, X is

The electrical power developed in the resistor above is

The voltage across a reactance carrying an a.c. I = 10 sin200πt is given by v = 20 sin (200 \(\pi\)t + \(\frac{\pi}{2}\)), Calculate the frequency.