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2- The heat conduction equation in a medium * is given in its simplest form as ( Select the correct statements below).
(1)/(r^(2))(del)/(delr)(r^(2)(delT)/(delr))=(1)/(\alpha )(delT)/(delt)The medium is of spherical shape. The thermal conductivity of the medium is constant. There is no heat generation within the medium. Heat conduction through the medium is onedimensional. Heat transfer through the medium is steady.