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प्रश्न
Why is a cement floor laid in small pieces with gaps in between?
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उत्तर
The floor is laid in small pieces with gaps in between to allow for the expansion during summer. However glass strips can be placed in the gaps.
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संबंधित प्रश्न
Write true or false for a given statement.
Heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact.
Write true or false for a given statement.
Solids expand the least and gases expand the most on being heated.
Fill in the blank
We use a ________ for measuring the temperature of a body.
Why do telephone wires sag in summer ?
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why ?
Describe one experiment to show that liquids expand on heating.
In summer, ice is kept wrapped in a gunny bag. Explain the reason.
Match the following
| 1. | Solid to liquid | a. | Condensation |
| 2. | Liquid to gas | b. | Deposition |
| 3. | Gas to solid | c. | Melting |
| 4. | Gas to liquid | d. | Vaporization |
Mention the factors affecting the flow of heat.
When heat energy is added to a substance, the kinetic energy of its particles ______ and so the particles move at a higher speed.
