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प्रश्न
Define one calorie.
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उत्तर
One calorie is the amount of heat energy required to raise the temperature of 1 gram of water through 1°C.
संबंधित प्रश्न
Name the three modes of transfer of heat.
Name the mode of transfer of heat in the following :
(a) solid,
(b) liquid,
(c) gas
(d) vacuum
Define the term heat.
While deciding the unit for heat, which temperature interval is chosen? Why?
What will absorb heat?
Wooden board
What will absorb heat?
Wooden spoon
What will absorb heat?
Soil
Name the SI unit of heat.
Complete the following sentence:
CGS units of heat is _________
If you apply some heat energy to a substance, which of the following can take place in it?
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.
In the past, people used to rub two wooden pieces together to light fire.
Analogy:
Movement of molecules:: Heat.
Heat energy:: ______.
Assertion: Small gaps left between railway lines.
Reason: It allows for the contraction of rails during summer.
Arrange the following in order of decreasing the expansion of heating: Steel, milk, air.
What is heat energy?
Warm air is ______.
