Physics Past Questions and Answers

A piece of copper of mass 20g at a temperature of 110°C was dropped into a mixture of ice and water at 0°C. If the final steady temperature of the mixture is 0°C . Calculate the amount of ice that melted [Specific heat capacity of copper = 0.4 Jg\(^{-1}\)K\(^{-1}\), specific latent heat of fusion of ice = 330Jg\(^{-1}\)]

Which of the following factors decreases the rate of evaporation of a liquid?

When two waves are superimposed on each other, the following occurrences are possible, except

Which of the following properties of waves is exclusive to transverse waves?

An object of height 2.5cm is places 20cm from a convex mirror of focal length 10cm. Calculate the height of its image.