Water at `100^@ C` cools in 10 minutes to `80^@ C` in a room temperature of `25^@ C`.Find the temperature of water after 20 minutes.

If a body cools from 80^@C to 50^@ C at room temperature of 25^@ C in 30 minutes.Find the temperature of the body after 1 hour.

If the room temperature is 20 °C then the temperature on Fahrenheit scale is

A body initially at 80^(@)" C" cools to 64^(@)" C" in 5 minutes and to 52^(@)"C" in 10 minutes. The temperature of the body after 10 minutes will be

The temperature of a body falls from 50^(@)C to 40^(@)C in 10 minutes. If the temperature of the surroundings is 20^(@)C Then temperature of the body after another 10 minutes will be

A body cools from 62^@C to 50^@C in 10 minutes. If the surrounding temperature is 26^@C the temperature at the end of next 10 minutes is A. 38^@C B. 45^@C C. 42^@C D. 40^@c

A body takes 8 min to cool from 60^@ C to 50^@C . If the temperature of sorrunding is 30^@C , then temperature of body after next 20 min. will be

A metal sphere cools at the rate of 0.05^@ C/s when its temperature is 70^@ C and at the rate of 0.025^@ C /s when its temperature is 50^@ C . Determine the temperature of the surroundings and find the rate of cooling when the temperature of the metal sphere is 40^@C .

Steam at 100^@C is passed into 20 g of water at 10^@C When water acquires a temperature of 80^@C , the mass of water present will be Take specific heat of water= 1 cal g^-1^@ C^-1 and latent heat of steam = 540 cal g^-1 )