2. Household Hot Water Systems
3. Air Conditioners
+ the rotary releases cool dry air
+ cool air is denser hence it sinks
+ warm air being less dense is drawn to where is cooled
+ air is recirculated, temp falls
air conditioners
4. Refrigerators
+ freezing unit placed at the top to cool air and facilitate sets up convection currents
Common Applications of Radiation
1. Teapots
+ shiny surface are BAD emitters of radiation
+ shiny teapots keeps the tea warm and they are BAD absorbers of radiation
+ it can also keep cold liquid cool
shiny teapots
2. Greenhouse
+ help plants to grow better by trapping heat during cold weathers
+ during the day, infrared radiation warms the soil and plants
greenhouse
3. Vacuum Flasks
+ helps to keep liquid hot
+ minimises heat loss through CONDUCTION, CONVECTION, RADIATION, EVAPORATION