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प्रश्न
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उत्तर
Three advantages of using mercury as a thermometric liquid:
(i) Mercury is a good conductor of heat.
(ii) Mercury has a high coefficient of expansion thus is sensitive to the smallest change in temperature.
(iii) Freezing points is very low and the boiling point is high.
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संबंधित प्रश्न
What do you understand by thermal expansion of a substance?
One rod of copper and another identical rod of iron are heated to the same rise in temperature. Which rod will expand more? Give reason.
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 cubical metal solid block is heated. How will its volume change?
Give scientific reason.
The telephone wires which sag in summer become straight in winter.
What is the velocity of thermal radiations?
Give reasons for the following:
Telephone wires sag in summer.
Complete the following sentence:
When ice melts its volume ______ and density _______.
Solids ______ on heating and ______ on cooling.
- Assertion: Gas is highly compressible than solid and liquid
- Reason: Interatomic or intermolecular distance in the gas is comparably high.
