give two real life application of thermal expansion of solid
Answers
Answer: railroad tracks and bridges
Explanation: Railroad tracks and bridges have expansion joints to allow them to freely expand and contract with temperature changes
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Applications of thermal expansion are:
♣ Thermometer
It is a device which uses linear expansion to measure the temperature of the body. When it comes in the contact with body the mercury rises up by which we can know body temperature.
♣ Pendulum clock
It also works on principle of thermal expansion. The metal rod used in it expands and its length increases during summers because of sun's heat and in winters, it winters the length decreases and made time of it wrong. It is made up of special type of steel called invar which have negligible expansion.
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