A 500-kg elevator is pulled upward with a constant force of 5500 n for a distance of 50.0 m. what is the work done by the weight of the elevator?

How does the nuclear charge relate to the energy of the 1s orbital?

Classify each of the following items as a rigid body, a system of rigid bodies, or a nonrigid body: a. a fishing pole, b. a diving board, c. a mechanical spring, d. a bowling ball, e. a baseball bat, f. a system of gears, g.

A box is pulled up a rough ramp that makes an angle of 22 degrees with the horizontal surface. The surface of the ramp is the x-plane, What is the magnitude of the force of tensionit te ne force in the direction of 98 N2 57N 139 N 178N 183N F =

What property of all ionic compounds make them electrolytes

Kathy has found she must consume 2000 cal a day to reach her health goals and she has been following this carefully, but leave me she had been feeling exhausted and dizzy.

The engine that powers a crane burns fuel at a temperature of 1500 oC. It is cooled by air at a temperature of 20 oC. The crane is used to lift a 1000 kg steel girder 30 m into the air.

The portion of a light ray that falls on a surface is a/an

Give the definition for diffusion. (A) gas molecules mix unequally average distance between collisions (B) gas molecules escape from a container into a vacuum through a small hole (C) gas molecules mix equally (D) gas molecules spread out in a

As resistance goes up, what happens to the current?

1. A 0.828-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. a) Find the momentum of the electron. b) Find the kinetic energy of the electron.