Physics Past Questions and Answers

What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100oC to 80oC? (Specific latent heat of steam = 2.260,000J kg-1) (Specific heat capacity of water =4,200 J kg-1)

The heating element in an electric kettle is usually located near the bottom of the kettle because

The inside of a vacuum flask is usually coated with silver to reduce heat lost by

The saturated vapour pressure of a liquid increases as the

Cloud formation is the direct result of