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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
Fill in the blank and rewrite the sentence.
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Which temperature segment is chosen when determining the unit of heat? Why?
Calorie is the unit of ______.
A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.
______ energy can be generated by the burning of fuels like coal, wood, charcoal, gasoline, etc.
A marble tile would feel cold as compared to a wooden tile on a winter morning because the marble tile ______.
In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.
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On a cold day, it is hard to open the lid of a tight container. But when you gently heat the neck you can easily open the lid. why?
Match the following:
| Column A | Column B | ||
| 1. | Heat | a. | Heat gained or lost in the change of state without any change in temperature |
| 2. | m × L. | b. | Heat gained or lost when there is no change of state |
| 3. | Temperature | c. | Form of energy |
| 4. | m × s × t | d. | SI unit of specific latent heat |
| 5. | J/Kg | e. | degree of hotness or coldness |
