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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 SI unit of heat.
Write scientific reason.
In the cold regions, snow falls in winter.
The unit of heat and temperature are the same.
If you apply some heat energy to a substance, which of the following can take place in it?
The process of converting a liquid into a solid is called ________.
The amount of heat gained by a substance is equal to the product of its mass and latent heat.
Calorie is the unit of ______.
______ is a form of energy.
The sun gives us light and heat.
In the past, people used to rub two wooden pieces together to light fire.
When an electric current is passing through the conductor ______ energy is produced.
In the arrangements A and B shown in the following figure, 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.
In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.
Assertion: Small gaps left between railway lines.
Reason: It allows for the contraction of rails during summer.
You would have noticed some space being left on railway tracks. Why?
Which of the following is true?
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 |
Heat gained by a body depends upon which factors?
