The velocity distribution for water (20°C) near a wall is given by u = a(y/b)1/6, where a =10 m/s, b=2 mm, and y is the distance from the wall in mm. Determine the shear stress in the water at y 1= mm.

Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volurge for a gas is much higher than the average volume for a liquid. d)-there is no difference