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प्रश्न
What do you understand by thermal expansion of a substance ?
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उत्तर
The expansion of a substance when, heated, is called thermal expansion.
Or
Thermal expansion is the tendency of matter to change .in shape, area and volume in response to a change in temperature.
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संबंधित प्रश्न
Write true or false for a given statement.
All solids expand by the same amount when heated to the same rise in temperature.
Write true or false for a given statement.
Water is a bad conductor of heat.
Why do telephone wires sag in summer ?
Why is a cement floor laid in small pieces with gaps in between?
State one application of thermal expansion of liquids.
State which expands more, when heated to the same temperature : solid, liquid or gas ?
Why is an oven made of double walls with the space in between filled with cork ?
The bottom of a cooking utensil is painted black. Give 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 |
______ is greater for liquids than solids and it is maximum in gases.
