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प्रश्न
Fill in the blank
A hot metallic piece is placed in tap water contained in a bucket. Heat will flow from _______ to _________
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उत्तर
A hot metallic piece is placed in tap water contained in a bucket. Heat will flow from metallic piece to water.
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संबंधित प्रश्न
Give two examples each of conductors and insulators of heat.
A wooden spoon is dipped in a cup of ice cream. Its other end ______.
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
Select the correct alternative
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.
Maximum heat is absorbed by a ______ coloured object.
Conduction of heat takes place through a ______ substance.
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 |
When ice changes into a liquid, it absorbs energy.
Wrap a thin paper strip tightly around an iron rod. Try to burn the paper with candle while rotating the iron rod continuously. Does it burn? Explain your observation.
