a) Thermal energy travels through the bottom of a pan by conduction. T
The energy is passed from one vibrating atom to the next. All metals are good conductors. Plastics, water, and air are poor conductions. (Good insulators) b) Convection currents can form when liquids and gases are heated.
The cold fluid sinks and the hot fluid rises. c) Energy can travel through empty space by radiation rays, which can be reflected by mirrors like light rays. Dull black surfaces are good radiators and good absorbers. Shiny, bright surfaces are bad radiators and bad absorbers. d) A vacuum flask uses silvering to cut down heat transfer by radiation and uses a vacuum to cut down heat transfer by conduction and convection.
The energy is passed from one vibrating atom to the next. All metals are good conductors. Plastics, water, and air are poor conductions. (Good insulators) b) Convection currents can form when liquids and gases are heated.
The cold fluid sinks and the hot fluid rises. c) Energy can travel through empty space by radiation rays, which can be reflected by mirrors like light rays. Dull black surfaces are good radiators and good absorbers. Shiny, bright surfaces are bad radiators and bad absorbers. d) A vacuum flask uses silvering to cut down heat transfer by radiation and uses a vacuum to cut down heat transfer by conduction and convection.
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