Chp 9 Thermal Processes

Conduction

Process of energy transfer where energy is transferred through the passing of vibrational motion from one particle to another

Convection

Process of energy transfer by means of convection currents of a fluid, due to difference in density

Radiation

Process of energy transfer by electromagnetic waves. It does not require a medium

Thermal equilibrium

A state in which two or more objects have the same temperature and that there is no net transfer of energy between them

Applications to conduction

1. Hair dryers

2. Instant water heaters

3. Thermal wear

4. Double/Triple-glazed Windows

Applications to Convection

1. Electric Kettles

2. Hot Air Balloons

3. Sea Breeze

4. Land Breeze

Applications to Radiation

1. Greenhouses

2. Space blanket

3. Global warming

Rate of transfer of energy by radiation is affected by:

1. Surface

2. Temperature

3. Surface area

4. Surface colour and texture