The minimum clearance between the blade tip and the tower on a large upwind HAWT is 1.6 m. The tower is tubular with a diameter of 3.0 m. Calculate the percentage reduction in axial wind speed due to tower shadow when a blade passes directly in front of the tower.

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?