If the turbulent velocity profile of water in a pipe of diameter 0.6 m may be approximated by where u is in m/s and y is in m, and 0.15 m from the u=(yR)17pipe wall the velocity is 2.7 m/s, estimate the wall shear stress and volumetric flow rate.

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?