A1 gram mass is connected through a spring of stiffness 4 n/m and a viscous damper that has a damping ratio of 0.6 to a base whose displacement is 3x106 m at a frequency of 150 rad/s. what is the amplitude of the displacement of the mass relative to the base?

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?