A brass bolt (Eb = 15 X 10^6 psi) of 3/8 in. diameter is fitted inside a steel tube (Es = 29 X 10^6 psi) of 7/8-in. outer diameter and 1/8 in. wall thickness. After the nut has been fit snugly, it is tightened a one-quarter full turn. Knowing that the bolt is single-threaded with a 0.1-in. pitch, determine the normal stress in: a. The bolt
b. The tube.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

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?

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.