Advertisements
Advertisements
प्रश्न
While deciding the unit for heat, which temperature interval is chosen? Why?
उत्तर
When deciding the unit for heat (which is a calorie), the temperature interval chosen is 14.5oC-15.5oC.
We know that the amount of heat released or absorbed by a body is given as `DeltaQ = msDeltaT`
Now, we also know that one calorie is defined as the amount of heat required to raise the temperature of 1 g of water through 1oC. Thus, for 1 calorie of heat energy, the specific heat capacity of water should be 1 cal g-1 oC-1. It is found experimentally that the specific heat capacity of water is 1 cal g-1 oC-1 when the temperature range is 14.5oC-15.5oC.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Heat is a form of _______.
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 |
What will absorb heat?
Iron griddle (tava)
What will absorb heat?
Wax
What will absorb heat?
Glass vessel
What will absorb heat?
Plastic plate
What will absorb heat?
Soil
Name the SI unit of heat.
Find the odd one out and give its explanation.
If you apply some heat energy to a substance, which of the following can take place in it?
We feel the heat on our body when the ______ shines.
______ is a form of energy.
We can absorb heat by rubbing two surfaces of some substances.
Analogy:
Movement of molecules:: Heat.
Heat energy:: ______.
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 |
What is heat energy?
Explain the following effects of heat.
Chemical changes
