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