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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 on heating is called the thermal expansion of the substance.
संबंधित प्रश्न
A longer rod expands ........... than a shorter rod on being heated to the same temperature.
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State one application of thermal expansion of liquids.
Describe an experiment to showthat air expands on heating.
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. Explain the reason.
What is the velocity of thermal radiations?
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Telephone wires sag in summer.
Complete the following sentence:
When ice melts its volume ______ and density _______.
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Thermal expansion is always a nuisance.
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Ordinary glass:: Glass tumbler.
Pyrex glass:: ______.
How solids are expanded on heating?
