Mechanical energy or work (W) can be converted into heat (Q) by 1 W = JQ The practical unit of heat energy is calorie.ġ calorie is the quantity of heat required to raise the temperature of 1 g of water by 1☌. Heat or thermal energy of a body is the sum of kinetic energies of all its constituent particles, on account of translational, vibrational and rotational motion. Heat is a form of energy called thermal energy which flows from a higher temperature body to a lower temperature body when they are placed in contact. Used to measure temperature are called thermometers.
The branch dealing with measurement of temperature is called thremometry and the devices
NCERT Notes For Physics Class 11 Chapter 11 :- Thermal Properties Of Matter
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