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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
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 |
Define the term calorie. How is it related to joule (the S.I. unit of heat)?
What will absorb heat?
Iron griddle (tava)
What will absorb heat?
Wax
Give a scientific reason.
In winter, why does an iron pillar feel colder than a wooden pole?
1 calorie is 4.81 joules.
Write scientific reason.
In the cold regions, snow falls in winter.
The amount of heat gained by a substance is equal to the product of its mass and latent heat.
Calorie is the unit of ______.
We reduce the heat by adding ______ while preparing fruit juice.
The sun gives us light and heat.
How can heat energy be generated?
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.
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?
Explain the following effects of heat.
Chemical changes
