Physics Past Questions and Answers

Water of mass 120g at 50^oC is added to 20og of water at 10^oC and the mixture is well stirred. Calculate the temperature of the mixture. [Neglect heat losses to the surrounding]

Calculate the energy required to vapourise 50g of water initially at 80^oC.[specific heat capacity of water = 2260Jg^-1K^-1][specific latent heat of vaporisation of water = 2260Jg^-1]

What type of motion does the skin of a 'talking' drum perform when it is struck with a drum stick?

A slinky spring fixed at one end is placed horizontally on a table. The free end is displaced parallel to the table and then released. The resultimg wavelength is

A radio wave has a wavelength of 150m. If the velocity of radio waves is free spaces is 3 x 10\(^8\) ms\(^{-1}\), calculate the frequency of the radio wave