Physics Past Questions and Answers

A perfect emitter or absorber of radiant energy is a

The ground is always cold at night because the

A cannon is fired from town X,after how long is the sound heard at a town Y 4.95 km away?<br/>[velocity of sound in the air = 330 ms<sup style='font-size: smaller;'>-1</sup>]

The phenomenon that shows that increase in pressure lowers the melting point can be observed in

A block of aluminum is heated electrically by a 30 w heater if the temperature rises by 10°c in 5 minutes, the heat capacity of the aluminum is