Effects of Heat

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State one application of thermal expansion of liquids.

Name the instrument used to measure the temperature of a body.

Write true or false for a given statement.

Kerosene contracts on heating.

Why do telephone wires sag in summer ?

Why are gaps left between successive rails on a railway track ?

Describe an experiment to show that air expands on heating.

Write true or false for a given statement.

Telephone wires are kept tight between the two poles in summer.

Write true or false for a given statement.

A mercury thermometer makes use of the property of the expansion of liquids on heating.