Wind provides a source of renewable energy that is increasingly being tapped. Modern wind turbines can convert up to 30% of the kinectic energy of the incoming wind blowing through their blades to electricity. Assuming that the wind at a proposed offshore location blows steadily at 20 knots, how much electrical power can be generated from a turbine with rotor diameter d=80m? By how much is the wind slowed when goiong through the turbine? Temperature of the air is 300K and its pressure is 1 bar. Air can be considered an ideal gas with Cv=5R/2.