A train travels from the of a hill to the top of a hill. It moves slower by the time it reaches the top. This is an example of

A force of 40N is applied at the end of a wire 4m long and produce an extension of 0.24mm if the diameter of the wire is 2mm. calculate the stress and strain of the wire

In moving out of a dormitory at the end of the semester, a student does 2.17 x 104 J of work. In the process, his internal energy decreases by 5.03 x 104 J.

An object has an acceleration of 0 m/s². Does this mean that the object must be stationary?

What will be the current when the capacitor has acquired 1/4 of its maximum charge?

Why can certain stars sometimes be identified as eclipsing binary stars?

Why do two hydrogen atoms bond to form a hydrogen molecule

Suppose the gravitational force between two spheres is 100 N. If the distance between the spheres is halved, what is the new gravitational force between them?

Ilya and Anya each can run at a speed of 8.00 mph and walk at a speed of 3.20 mph. They set off together on a route of length 5.00 miles.

Jill is getting ready to push little Frank in his swing. She pulls Frank back as high as she can and then releases the swing. What is the initial transfer of energy that accelerates the swing when she lets go?

Which phenomenon generates electric current? A black body radiation B ultraviolet catastrophe C emission spectra D photoelectric effect