a ball is thrown horizontally from the roof of a building 45.0 m tall and lands 24.0 m from the base. What was the ball's initial speed?

A machine has an efficiency of 70%. How much work dose the machine do when 20,000 J of work is done on it?

A current in a wire increases from 2 A to 6 A. How will the magnetic field 0.01 m from the wire change?

The net electric flux through a cubic box with sides that are 22.0 cm long is 4.90 * 10 3 N ⋅ m 2 / C 4.90*103 N⋅m2/C. What charge Q is enclosed by the box?

Jamie is not sure a new medication will work because it has not had a large test group. Is jamie being creative?

A 30.0 kg object rests on a flat, frictionless surface. A rope lifts up on the object with a force of 309 N. What is the acceleration of the object?

A roller coaster car travels up and down the hills of its track. Neglecting friction, the sum of its kinetic and potential energy A. equals the sum of the thermal energy generated by friction during the ride. B.

In a transverse wave, if you increase of the wave you will get what kind of wavelength

What kind of system does not allow matter or energy to enter or exit? A. Connected B. Isolated C. Open D. Closed

Are the objects described here in static equilibrium, dynamic equilibrium, or not in equilibrium at all? a. A girder is lifted at constant speed by a crane. b. A girder is lowered by a crane. It is slowing down. c.

What kind of friction is shown between the skydiver and the air?