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प्रश्न
Do all substances expand on heating? Give examples.
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उत्तर
Not all substances expand on heating. Some examples of substances which do not expand on heating are plastics, polythene and rubber.
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संबंधित प्रश्न
Define temperature and write its SI unit.
State the types of thermal expansion. What is the relation between α and γ?
Is it possible to heat a liquid or gas from above? Explain your answer.
State three main characteristics of a thermometric substance.
State the advantages and disadvantages of mercury and alcohol as thermometric liquids.
Explain the following:
It is cool in the shade, when it is hot outside.
The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.
Explain:
(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?
Match the following:
| Column-I | Column-II | |
| 1. | Length | s |
| 2. | Mass | m |
| 3. | Time | k |
| 4. | Temperature | kg |
