Physics - P2: Energy transfer by heating

Conduction

When heat is transferred through a solid

-This is done when the vibrating particles of a solid transfer energy to neighbouring particles through collision

Convection

When heat is transferred through a fluid (liquid or gas)

-This is done when particles of the fluid move in a convection current, which is when warm particles move to a cool region and cool particles move to a warm region.

Radiation

When heat is transferred through waves

-This is done when a hot object emits a lot of radiation, for instance, the Sun, and an object absorbs this radiation

Specific Heat Capacity

The energy required to raise the temperature of 1kg of a material by 1ºC

Thermal conductivity

The rate of thermal energy transferred by conduction

How much energy per second is transferred to a material depends on:

•Conductivity

•Thickness

•Temperature