Advertisements
Advertisements
प्रश्न
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.
संक्षेप में उत्तर
उत्तर
- Position P will feel warmer than T because when the air gets heated, it rises upwards.
- P → Convection
T → Radiation
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Heat is a form of _______.
Select the correct alternative
A thermometer uses
Name the mode of transfer of heat in the following :
(a) solid,
(b) liquid,
(c) gas
(d) vacuum
What will absorb heat?
Wax
Give scientific reason.
Dew drops form on the grass in winter.
To keep her soup warm Paheli wrapped the container in which it was kept with a woollen cloth. Can she apply the same method to keep a glass of cold drink cool? Give a reason for your answer.
The SI unit of heat energy is ______.
Black color is a ______ absorber of heat.
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 |
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 |