At a given temperature maximum wavelength is 6500A for a black body cavity. what will be the maximum wavelength if the temperature of the cavity wall is increased so that the rate of emission of spectral radiation is doubled​

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.