Wind farms are a source of renewable energy found around the world. the power p (in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v (in meters per second). if a turbine generates 500kw in a 10m/s wind, how much power does it generate in a 12m/s wind? .

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

What sort of waves exhibit the doppler effect?