[" A piece of metalfloatts on mercury .The coefficient of volume expansion of the metal and mercury are "],[gamma_(1)& gamma_(2)" respectively.If the temperatures of both mercury and the metal are increased by an amount "],[" AT,the fraction of the volume of the metal submerged in mercury changes by the factor of."],[" (Ratio of finaltraction to the initial fraction) "],[[" (A) "(1+gamma_(2)AT)/(1+gamma_(1)Delta T)," (B) "(1+gamma,Delta T)/(1+gamma_(2)Delta T)," (C) "1+(gamma_(1)+gamma_(2))Delta T," (D) None of these "]]