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[" The radius of a metal sphere at room temperature "T" is "R" ,and the coefficient of linear expansion "],[" metal is "alpha" .The sphere is heated a little by a temperature "Delta T" so that its new temperature is "T+],[" The increase in the volume of the sphere is approximately "],[[" (A) "2 pi R alpha,Delta T," (B) "pi R^(2)alpha Delta T," (C) "4 pi R^(3)alpha Delta T/3," (D) "4 pi R^(3)]]

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