jane walks up the stairs and gains 1200J of potential energy. if she runs up the stairs in half the time what would be her gain in potential energy?

Two children hang by their hands from the same tree branch. the branch is straight, and grows out from the tree trunk at an angle of 27.5° above the horizontal. one child, with a mass of 45.6 kg, is hanging 1.

How can people influence chemical weathering

A 1.50-mF capacitor is connected to a North American electrical outlet (ΔVrms = 120 V, f = 60.0 Hz). Assuming the energy stored in the capacitor is zero at t = 0, determine the magnitude of the current in the wires at t = 1/171s.

A mass on a spring vibrates horizontally on a smooth level surface. its equation of motion is x (t) = 8 sin (t), where t is in seconds and x in centimeters. find the velocity and acceleration of time.

What are the basic primitive solids?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.

Does the sun fuse hydrogen into helium or vice versa?

Is it possible to put a distance versus time graph to be universal go mine