Assume that a small model wind turbine of diameter 90 cm, rotating at 1200 rev/min, delivers power of 280W, when subjected to a wind of 12 m/s. The data is to be used for a prototype of diameter 50 m and winds of 8 m/s.
For dynamic similarity, estimate (a) the rotation rate, and (b) the power delivered by the prototype. Assume sea-level air density.

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