Question

13. Wind power scaling. Fill in the blank: A wind of 8 miles per hour produces _____ times as much power as a wind of 2 miles per hour.

14. Wind power at high altitudes. People have proposed building balloon-borne turbines , to capture wind power at high altitudes. Suppose at some height in the upper atmosphere, the air density is 1/100 of what it is near the Earth’s surface, but the wind speed is 10 times higher. Is thepower carried by the wind over a given area higher or lower at this upper atmosphere location, compared to near the Earth’s surface?

Answer 1