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The increase in dimensions of a body due...

The increase in dimensions of a body due to increase in temperature is called thermal expansion.
Railway lines are laid with gaps to allow for expansion.If the gap between steel rails `60m` long is `3.63 cm` at `10°C`,then at what temperature will the line just touch?Coefficient of linear expansion for steel is `11×10^(-6) /oC`

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A steel beam of length 5m is kept at a temperature of (deg 20C) .On a hot day the temperature rises to (deg40C) .What is the change in its length due to thermal expansion. Coefficient of linear expansion of steel is (1.2X 10^(-5) /(degC))

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