Velocity profiles and the stress components tauij, For each of the following velocity distributions, draw a meaningful sketch showing the flow pattern. Then find all the components of tau and pvv for the Newtonian fluid. The parameter b is a constant. (a) vx = by, vy = 0,v = 0
(b) vx = by, vy = bx, v2 = 0
(c) vx = -by, vy = bx, vz = 0
(d) v = -1/2bx, vy = 1/2by, v2 = bz

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?