Ace raised a 12 N book from a table 75 cm above the floor to a shelf , 2.15 m above the floor . What was the change in potential energy ?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

Arrange the images in order to show how lake-effect snow occurs.

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?