The materials which trap air inside them are
When temperature of an object is higher than its surroundings then as compare to absorbing, it is radiating
A metal box having four faces of different nature is called
The rising currents of hot air are called
Poor conductors of heat are
The mode of transfer of heat by vibrating atoms and free electrons in solids from hot to cold parts of a body is known as heat's
The rate of heat flow is
Central heating systems in buildings work on the principle of
The good conductors of heat is
The process in which heat is transferred in form of waves is called
Central heating system in buildings work on the principle of
As compared to non-metals, heat reaches from the hot part to the cold parts of the metal objects
If the temperature of an object is higher than its surroundings then it is
Metals are good conductors due to
A small airplane without engine which ride over the terminals is known as
Like light rays, heat radiations also obey
As compare to black surface, a white surface reflects
When temperature of an object is lower than its surroundings then as compare to absorbing, it is radiating
Carbon dioxide in atmosphere traps the radiation and causes
The mode of transfer of heat from one place to another in the form of electromagnetic waves is called
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