To lift a load to roof, you apply 21 n of force to a pulley. the pulley applies 21 n of force to the load. what is the mechanical advantage of the pulley?

What happens when the internal energy of a material increases?. A. its temperature will rise B. it will go through a phase change C. A and B D. A or B

If we start with 400 atoms of a radioactive substance, how many would remain after one half-life? After 2 half-lives? After 3 half-lives? After 4 half-lives?

When the height of the cylinder increased by a factor of 5, from 100 m to 500 m, what happened to the cylinder's gravitational potential energy?

with how much force does the water push on the diver?

During each cycle, a heat engine ejects 75 J of thermal energy for every 115 J of input thermal energy. This engine is used to lift a 345-kg load a vertical distance of 27.0 m at a steady rate of 52.5 mm/s.

Why is fluorine special in terms of electronegativity?

The airbag inflates and deflates quickly so

Two conducting spheres are each given a charge Q. The radius of the larger sphere is three times greater than that of the smaller sphere.

A solenoid with a ferromagnetic core is

When Cannon and Washburn measured stomach contractions with a balloon, they found that?