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What force should be applied to the ends...

What force should be applied to the ends of steel rod of cross sectional area `10 cm^(2)` to prevent it from elongation when heated from 273 K to 303 k ? `(alpha " of steel"= 10^(-5).^(@)C ^(-1),Y=2xx 10^(11) NH^(-2))`

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What force should be applied to the ends of steel rod of cross sectional area 10 cm^(2) to prevent it form elongation when heated form 273 K to 303 k ? (alpha " of steel" 10^(-5).^(@)C ^(-1),Y=2xx 10^(11) NH^(-2))

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A steel rod of length 50 cm has a cross–sectional area of 0.4 cm^(2) . What force would be required to stretch this rod by the same amount as the expansion produced by heating it through 10^(@)C . ( alpha = 10^(-5) k^(-1) and Y = 2 xx 10^(11) N//m^(2))