How do objects of spectral types l, t, and y differ from those of the other spectral types?

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?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false