Transfer of Heat

Transfer of Heat
As compare to black surface, a white surface reflects
nothing
equal
less
more
Author: rikazzz Comment
Everyday Science
Eagles fly without flapping their wings due to
air currents
sun radiation
thermal climbing
none of above
Author: rikazzz Comment
Transfer of Heat
When temperature of an object is higher than its surroundings then as compare to absorbing, it is radiating
more heat
less heat
equal heat
zero heat
Author: rikazzz Comment
Transfer of Heat
Heat transfers in
3 ways
2 ways
4 ways
5 ways
Author: rikazzz Comment
Transfer of Heat
Thermal energy from a hot body flows to a cold body in the form of
sound
signals
heat
waves
Author: rikazzz Comment
Transfer of Heat
The amount of heat that flows in unit time is called the heat’s
rate on indicacy
rate of stress
flow of heat
rate of power
Author: rikazzz Comment
Transfer of Heat
As compared to non-metals, heat reaches from the hot part to the cold parts of the metal objects
slowly
quickly
equal time
none of above
Author: rikazzz Comment
Transfer of Heat
Central heating systems in buildings work on the principle of
convection
radiation
conduction
all of above
Author: rikazzz Comment
Transfer of Heat
When temperature of an object is lower than its surroundings then as compare to absorbing, it is radiating
more heat
less heat
equal heat
zero heat
Author: rikazzz Comment
Transfer of Heat
The thermal conductivity of plastic foam is
0.05
0.03
0.02
0.06
Author: rikazzz Comment

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