Heat flow (Q)

Definition

Heat flow, represented by Q, is the transfer of thermal energy from one object to another due to a difference in temperature. It is measured in units of joules (J).

Related terms

Convection:

Heat transfer through fluid motion, such as air or liquid currents.

Radiation:

Heat transfer through electromagnetic waves, such as sunlight warming up an object.

Specific heat capacity: The amount of heat required to raise the temperature of a substance by 1 degree Celsius.