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प्रश्न
Fill in the blank
Heat is a form of _______.
विकल्प
electrical energy
gravitational energy
thermal energy
None of these
उत्तर १
Heat is a form of energy.
उत्तर २
Heat is a form of thermal energy.
संबंधित प्रश्न
Select the correct alternative
A thermometer uses
Define one kilo-calorie of heat.
What will absorb heat?
Steel spoon
What will absorb heat?
Glass vessel
Give scientific reason.
Dew drops form on the grass in winter.
Give a scientific reason.
In winter, why does an iron pillar feel colder than a wooden pole?
1 calorie is 4.81 joules.
The unit of heat is
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
We can absorb heat by rubbing two surfaces of some substances.
In the past, people used to rub two wooden pieces together to light fire.
Analogy:
Movement of molecules:: Heat.
Heat energy:: ______.
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 a reason for your answer.
In arrangements, A and B shown in Figure 4.7, pins P and Q are fixed to a metal loop and an iron rod with the help of wax. In which case are both the pins likely to fall at different times? Explain.
The water in the black can becomes ______ than that in a white can after exposure to the sun.
In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.
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?
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 |
