Water flows through a horizontal 60-mm diameter galvanized iron pipe at a rate of .02 m^3/s. if the pressure drop is 135 kpa per 10 m of pipe, do you think this pipe is a) a new pipe b) an old pipe with a somewhat increased roughness due to again justify your answer any would be great alot

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