Aflat-belt drive is to consist of two 4-ft-diameter cast-iron pulleys spaced 16 ft apart. selecta belt type to transmit 60 hp at a pulley speed of 380 rev/min. use a service factor of 1.1 anda design factor of 1.0.

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?