Question

Therm is the unit of
A. heat
B. temperature
C. thermometry
D. work

Answer 1

Hint: Heat energy is transferred from one body to another when there is temperature difference. Energy travels from hotter body to cooler body.

Complete step by step answer:
The therm is not a SI unit of heat energy equal to 100000 British thermal units (Btu). It is approximately the energy similar to burning 100 cubic feet –often referred to as \[1CCF\] of natural gas.

Heat is a form of energy called thermal energy. When we bring a hot body in thermal contact with a cold body, the temperature of the hot body decreases, and the temperature of the cold body increases. The energy of the hot body decreases and that of the cold body increases. This transfer of energy takes place until the two bodies attain a common temperature. So heat flows from a body at a higher temperature to a body at a lower temperature. SI unit of heat energy is the joule.

Temperature is defined as the thermal condition of a body which determines its ability to transfer heat to the other body. The body’s measure of hotness and coldness is known as the degree of temperature. Temperature determines the direction of the net flow of heat. SI unit of temperature is Kelvin (K).
The branch of heat that deals with the measurement of temperature is called thermometry. An instrument used to measure the temperature of a body is called a thermometer.

Work done is a product of force and displacement of a body. SI unit of work is Joule.

Out of these four options therm is one of the units of heat.

The Correct option is (A).

Note: Heat energy always flows from a higher temperature body to a lower temperature body.
A calorie is the most commonly used unit of heat.