Define heat in terms of K.E. Give its SI unit.
The total sum of kinetic energy contained by the molecules of the body is called the heat energy of that body.
Its SI unit is Joule.
Water boils at 100°C . Ocean water changes into vapour to form cloud though ocean doesn't have 100°C temperature . Why ?
The formation of cloud above ocean is due to evaporation, not boiling. And evaporation takes place in any temperature. So ocean water need not to be 100 degree Celsius for forming cloud.