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A steel beam of length 5m is kept at a t...

A steel beam of length 5m is kept at a temperature of `20^@C` . On a hot day, the temperature rises to `40^@`C. What is the change in its length due to thermal expansion ? (Coffecient of linear expansion of steel = `1.2xx10^-5/^@C`).

Text Solution

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`alpha_l=(trianglel)/(LtriangleT)`
`trianglel=alpha_LtriangleT=1.2xx10^-5xx5xx(40-20)=1.2xx10^-3m`
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