Water flows with a velocity of 7 fps and at a depth of 4 ft in a rectangular channel. A. Is the flow subcritical or supercritical? B. Find the alternate depth for the same discharge and specific energy by direct solution. C. Calculate the alternate depth (i) By direct solution (ii) using the dimensionless discharge curve (y/E vs. q/q_mar).

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