The total Tangential force on one ring of a Parson's Reaction turbine is 12000 N, when the blade speed is 100 m/s. the mass flow rate is 8 kg/s. the blade outlet angle is 20 degree. If the frictional losses occurred with pure impulse is 25 % of K. E. correspondence to relative velocity at entry of each ring of blade. the expansion losses are 20% of heat drop in the blade. What will be the absolute velocity of steam at exit?

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?