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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
The increase in length of a metal rod depends on
What is matter? What is it composed of?
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.
A metal plate is heated. State three factors on which the increase in its area will depend.
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.
Give scientific reason.
An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not.
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?
If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.
The expansion in volume is called linear expansion.
