Question

Discuss a few applications of expansion of solids​

Answer 1

Answer:

Bimetallic strips are used as temperature controlling devices. The bending of the bimetallic strip is due to the difference in the coefficient of linear expansion of two different metals used in the bimetallic strip. ... Such strips can be used in electric iron, electric oven, refrigerators to control the temperature...

Answer 2

Solids also undergo thermal expansion. Railroad tracks and bridges, for example, have expansion joints to allow them to freely expand and contract with temperature changes. ... First, thermal expansion is clearly related to temperature change. The greater the temperature change, the more a bimetallic strip will bend.

Railway tracks consist of two parallel metal rails joined together. Small gaps, called expansion gaps, are deliberately left between the rails as there is an expansion of the rails in hot weather. Water expands on heating.

If you have ever tried to unscrew a stuck lid off a glass jar, you'll appreciate this expansion effect.

Bridges have a long span and in hot weather the materials that the bridge is made of will expand.

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