1. The problem statement, all variables and given/known data Two sites are being considered for wind power generation. In the first site, the wind blows steadily at 7 m/s for 3000 hours per year, whereas the second site the wind blows at 10m/s for 2000 hours per year. Assuming wind velocity is negligible at other times for simplicity, determine which is a better site for wind power generation. Hint: note that the mass flow rate of air is proportional to wind velocity. 2. Relevant equations e=KE=(V^2)/2 E = me 3. The attempt at a solution Ok so I found e1 and e2 with the first equation. Which gives me 24.5 and 50 J/Kg (respectively) But i'm stuck now. How can I find m? It says that that the mass flow rate of air is proportional to wind velocity but how can I tie in time? Any hints would help. I can tell that the second site would be more efficient, but I can't explain why.