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[" 11.The work per unit volume to stretc...

[" 11.The work per unit volume to stretch the length by "1%],[" of a wire with cross sectional area of "1mm^(2)" will be."],[[Y=9times10^(11)N/m^(2)]],[" (a) "9times10^(11)J],[" (c) "9times10^(7)Jquad " (b) "4.5times10^(7)J],[" A smooth uniform string of natural length "1" ."]

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