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प्रश्न
What is heat ? State its S.I. unit.
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उत्तर
Heat is a form of energy which flows. It is the energy of motion of molecules constituting the body.
The unit of heat is same as that of energy, The S.I. unit of heat is joule (abbreviated as J) and other common units of heat are calorie and kilo calorie, where 1 kcal = 1000 cal.
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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
What will absorb heat?
Glass vessel
Which temperature segment is chosen when determining the unit of heat? Why?
The amount of heat gained by a substance is equal to the product of its mass and latent heat.
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
We feel the heat on our body when the ______ shines.
To keep her soup warm Paheli wrapped the container in which it was kept with a woollen cloth. Can she apply the same method to keep a glass of cold drink cool? Give reason for your answer.
Black color is a ______ absorber of heat.
Explain the following effects of heat.
Chemical changes
