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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
A longer rod expands ........... than a shorter rod on being heated to the same temperature.
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?
Define the following term:
Coefficient of superficial expansion
Define the following term:
Coefficient of cubical expansion
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 _______.
What is thermal expansion?
What difference do you think heating the solid will make in their molecules?
