Afatigue test was conducted in which the mean stress was 90 mpa (13050 psi), and the stress amplitude was 190 mpa (27560 psi). (a) compute the maximum stress level. entry field with correct answer 280 mpa (b) compute the minimum stress level. entry field with correct answer -100 mpa (c) compute the stress ratio. entry field with correct answer -0.36 (d) compute the magnitude of the stress range.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

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?

Burgers vector is generally parallel to the dislocation line. a)-true b)-false