Steel wire of length L at 40 C is suspended from the ceiling

Last updated: 6/8/2023

Steel wire of length L at 40 C is suspended from the ceiling and then a mass m is hung from its free end The wire is cooled down from 40 C to 30 C to regain its original length L The coefficient of linear thermal expansion of the steel is 105PC Young s modulus of steel is 10 N m and radius of the vire is 1 mm Assume that L diameter of the wire Then the value of m in kg is nearly 2011