The electric field everywhere on the surface of a thin, spherical shell of radius 0.750 m is of magnitude 890 n/c and points radially toward the center of the sphere. (a) what is the net charge in nano coulomb within the sphere’s surface? (b) what can you conclude about the nature and distribution of the charge inside the spherical shell?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?