Advertisements
Advertisements
प्रश्न
Define one calorie.
Advertisements
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 _______.
Name the mode of transfer of heat in the following :
(a) solid,
(b) liquid,
(c) gas
(d) vacuum
Draw a labelled diagram of a thermo flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.
Define the term calorie. How is it related to joule (the S.I. unit of heat)?
What will absorb heat?
Wax
Complete the following sentence:
CGS units of heat is _________
When an object is heated, the molecules that make up the object
The unit of heat is
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.
______ energy can be generated by the burning of fuels like coal, wood, charcoal, gasoline, etc.
The sun gives us light and heat.
When an electric current is passing through the conductor ______ energy is produced.
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 |
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 |
