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प्रश्न
Define one calorie.
उत्तर
One calorie is the amount of heat energy required to raise the temperature of 1 gram of water through 1°C.
संबंधित प्रश्न
Fill in the blank
Heat is a form of _______.
Define the term heat.
While deciding the unit for heat, which temperature interval is chosen? Why?
What will absorb heat?
Water
Which temperature segment is chosen when determining the unit of heat? Why?
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 ________.
Calorie is the unit of ______.
A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.
We reduce the heat by adding ______ while preparing fruit juice.
______ energy can be generated by the burning of fuels like coal, wood, charcoal, gasoline, etc.
______ is a form of energy.
The sun gives us light and heat.
When an electric current is passing through the conductor ______ energy is produced.
Observe the picture given in Figure 4.8. 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.
In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.
Match the following
| 1. | Heat | a. | Good absorber |
| 2. | Temperature | b. | Form of energy |
| 3. | Black surface | c. | Insulators |
| 4. | Rubber, cork | d. | The measure of hotness or coldness |
You would have noticed some space being left on railway tracks. 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 |
