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[" A steel tape measures the length of a copper rod as "90.00cm" when both are at "10^(@)C" ,the calibration temperatur "],[" for the tape.The tape read the length of the rod when both are at "30^(@)C" is found to be "90.0xcm" .Find th "],[" value of "x" .(Given "alpha_(c)=1.7times10^(-15)" per "^(@)C" and "alpha_(s)=1.2times10^(-5)" per "^(@)C." ) "]

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