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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
Equal volumes of different liquids expand by a different amount when they are heated to the same rise in temperature.
Two identical rods of copper are heated to different temperatures — one by 5°C and the other by 10°C. Which rod will expand more?
In the ball and ring experiment, if the ball after heating is left to cool on the ring for sometime, the ball again passes through the ring. Explain the reason.
A metal plate is heated. State three factors on which the increase in its area will depend.
State one application of thermal expansion of liquids.
An iron washer is heated. State the effect on its external.
What is the velocity of thermal radiations?
Distinguish between a clinical and a laboratory thermometer.
The diagram shows a sketch graph showing a change in volume of a given mass of ice at -5°C to water at 15°C.
(i) Why does the temperature along BC remain constant?
(ii) When is the volume of water minimum?
(iii) At what temperature does water have maximum density? Explain.
Complete the following sentence:
When ice melts its volume ______ and density _______.
Give reason for the following
An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not.
What is thermal expansion?
Analogy:
Ordinary glass:: Glass tumbler.
Pyrex glass:: ______.
How solids are expanded on heating?
When we cool the liquid it will become ______.
