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प्रश्न
Name the SI unit of heat.
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उत्तर
Joule is the SI unit of heat.
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संबंधित प्रश्न
Match the following
| Column A | Column B |
| 1. mercury | 1. insulator |
| 2. wood | 2. water from 0°C to 4°C |
| 3. Aluminum | 3.absorbs |
| 4. contracts | 4.conductor |
| 5.black surface | 5. Thermometer |
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?
Iron griddle (tava)
What will absorb heat?
Plastic plate
What will absorb heat?
Soil
Give scientific reason.
Dew drops form on the grass in winter.
The unit of heat and temperature are the same.
Define one calorie.
We can absorb heat by rubbing two surfaces of some substances.
Observe the picture given in figure. Water is being boiled in a pan of wide base.
- Which position P or T will feel warmer?
- Fill up the boxes P and T to indicate the mode of flow of heat to the hand.
The water in the black can becomes ______ than that in a white can after exposure to the sun.
Black color is a ______ absorber of heat.
In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.
Which of the following is true?
In which of the following, chemical energy is converted into heat energy?
Warm air is ______.
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 |
