The temperature of 600 g of cold water rises by 15°C when 300 g of hot water at 50°C is added to it. What was the initial temperature of the cold water?

1.0 kg of water is contained in a 1.25 kW kettle. Calculate the time taken for the temperature of water to rise from 25° C to it's boiling point 100° C. Specific heat capacity of water = 4.2 J g^-1 K^-1.

An increase in pressure results in …………… in melting point of ice :

1. increase
2. no change
3. decrease
4. none of the above

At high altitudes, water boils at a temperature of :

1. 100°C
2. more than 100°C
3. less than 100°C
4. 150°C