Physics Past Questions and Answers

A quantity of gas occupled a certain volume when the temperature is \(73^{\circ} \mathrm{C}\) and the pressure is increased to \(4.5\) atmospheres the volume is halved at the same time, what will be the new temperature of the gas?

What is the least possible error in using a rule graduated in centimeters?

Which of the following affects the period of simple pendulum? (I) mass of pendulum bob (II) length of the pendulum (III) acceleration due to gravity

A boy sits in a train moving with a uniform speed on a straight track-if from his outstretched palm he gently tossed a coin vertically upwards, the coin will fall ____________

A machine required \(100 \mathrm{~J}\) of work to raise a load of \(500 \mathrm{~N}\) through Avertical distance of \(1.5 \mathrm{~m}\). Calculate the efficiency of the machine.