PRINCIPLE OF CALORIMETRY

If no heat is exchanged with surrounding, heat lost by the hot body is equal to heat gained by the cold body. 

70 to 80% water in plants and animals. Why?

Plants and animals have 70-80% water so that they can maintain body temperature as water has high specific heat capacity.

FARMERS FILL THEIR FIELDS WITH WATER.

Farmers fill their crop fields with water to protect from frost: why?

Water has high specific heat capacity so it delays the surrounding temperature to fall to zero degree Celsius ,thus protecting the crops from frost

FOMENTATION

Why is water used in fomentation ?

Water has high specific capacity due to which it cools slowly and imparts large amount of heat to our body.