You are selecting a bearing to support a radial load of 2 kN where the shaft will rotate at a speed of 520 rev/min. Consider a 02-series deep-groove ball bearing: Determine the catalog rating required if the bearing is to operate for 40 kh with a target reliability of 0.8 for machinery with light impact.

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?