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प्रश्न
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?
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उत्तर
In summer when the temperature increases considerably the bridge made of metal expands and rollers slide to allow for expansion otherwise the bridge may break the pillar.
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संबंधित प्रश्न
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.
State one application of thermal expansion of liquids.
Describe an experiment to show that same volume of different liquids heated to same rise in temperature expand by different amounts.
An iron washer is heated. State the effect on its mass.
An iron washer is heated. State the effect on its internal diameter.
At what temperature the pure water has (a) maximum density (b) minimum volume?
Define the following term:
Coefficient of superficial expansion
Solids ______ on heating and ______ on cooling.
Borosilicate glass do not expand much on being heated.
How solids are expanded on heating?
