The temperature of water falling from a dam gets increased by `0.1^@C`.Find the height of dam.

It has been recorde that the temperature of the earth's atmosphere has increased by 0.6^@C What has caused this increase?

It has been recorde that the temperature of the earth's atmosphere has increased by 0.6^@C Explain its consequences.

The angle of elevation of the top of a tower from a point A on the ground is 30^@ . On moving a distance of 20 metres towards the foot of the tower to a point B, the angle of elevation increases to 60^@ . Find the height of the tower and distance of the tower from the point A.

The efficiency of an ideal engine is 1/8 . By lowering the temperature of the sink by 100 K, it increases to 1/4 . Find initial and final temperature of sink.

Temperature of 1 mole of a gas is increased by 2^(@)C at constant pressure. Work done is :

What do we get from sea water?