Acylindrical part of diameter d is loaded by an axial force p. this causes a stress of pia, where a= 10-14. if the load is known with an uncertainty of 112 percent, the diameter is known within 14 percent (tolerances), and the stress that causes failure (strength) is known within t19 percent, determine the minimum design factor that will guarantee that the part will not fail.

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?