A machine component is subjected to an axial load that varies from 3000 lb compression to 5000 lb tension. Determine the combination of maximum and minimum stresses to which the member could probably be subjected millions of times without failure by slip or fracture if the proposed material is hardened and tempered 0.93 percent carbon spring-steel with an endurance limit of 56 ksi, a proportional limit of 85 ksi, and an ultimate strength of 97 ksi.

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?

Around steel bar, made from material with a yield stress of 750mpa, is loaded so that it has stresses co locations of maximum normal stress and maximum shear stress. use maximum shear stress and maximum distortion energy theories to calculate the safety factors for initial yielding failures.

Major ingredients of traditional ceramics (a) silica (b) clay (c) feldspar (d) all