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प्रश्न
Define the following term:
Coefficient of superficial expansion
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उत्तर
The coefficient of superficial expansion is equal to the change in the area of a rod of area 1m2 when its temperature rises by 1°c.
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संबंधित प्रश्न
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?
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.
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.
The telephone wires which sag in summer become straight in winter.
Give reasons for the following:
Telephone wires sag in summer.
Complete the following sentence:
When ice melts its volume ______ and density _______.
Borosilicate glass do not expand much on being heated.
What is thermal expansion?
What type of glassware is used in laboratories? Why?
