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प्रश्न
Select the correct alternative
In the process of convection, heat travel
विकल्प
sideways
downwards
upwards
in all directions
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उत्तर
upwards
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संबंधित प्रश्न
A wooden spoon is dipped in a cup of ice cream. Its other end ______.
Stainless steel pans are usually provided with copper bottoms. The reason for this could be that ______.
Write true or false for a given statement.
Medium is necessary for the transfer of heat by radiation.
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
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Heat in a liquid is transferred by
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The vacuum kept in between the walls of a thermos flask reduces the heat transfer by
State the direction of heat transfer by way of convection.
Conduction of heat takes place through a ______ substance.
The earth receives heat from the sun by ______.
Match the items in column-I to the items in column-II
| Column-I | Column-II | ||
| 1. | Linear expansion | (a) | change in volume |
| 2. | Superficial expansion | (b) | hot body to cold body |
| 3. | Cubical expansion | (c) | 1.381 X 10-23 JK-1 |
| 4. | Cubical expansion | (d) | change in length |
| 5. | Boltzmann constant | (e) | change in area |
