state two application s of thermal expansion in our daily life
Answers
it is used in railways i.e to make railway tracks
to open the lid of jam bottle
IN current line wires
Applications of Thermal Expansion in everyday life
Thermal expansion is used in our daily life.
Thermometers
In thermometers, thermal expansion is used in temperature measurements.
Removing tight lids
To open the cap of a bottle that is tight enough, immerse in it hot water for a minute or so. Metal cap expands and becomes loose. It would now be easy to turn it to open.
Riveting
To join steel plates tightly together, red hot rivets are forced through holes in the plates. The end of hot rivets is then hammered. On cooling, the rivets contract and bring the plates tightly gripped.
Fixing metal tires on wooden wheels
Iron rims are fixed on wooden wheels of carts. Iron rims are heated. Thermal expansion allows them to slip over the wooden wheel. Water is poured on it to cool. The rim contracts and becomes tight over the wheel.
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