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Equal volumes of different liquids expand by a different amount when they are heated to the same rise in temperature.
The increase in length of a metal rod depends on
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.
Describe an experiment to showthat air expands on heating.
Give scientific reason.
The telephone wires which sag in summer become straight in winter.
Give reasons for the following:
In cold countries, water pipes burst in winter.
Thermal expansion is always a nuisance.
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.
What type of glassware is used in laboratories? Why?
