An athlete is working out in the weight room. He steadily holds 50 kilograms above his head for 10 seconds. Which statement is true about this situation?

Which object possesses more gravitational potential energy: a 2-kilogram ball at 2.2 meters above the ground or a bullet that is. 15 kilograms at a height of 74 meters above the ground? Explain.

Which of the following statements about electrons is not true? A) Electrons orbit the nucleus rather like planets orbiting the Sun. B) Within an atom, an electron can have only particular energies.

Why does friction reduce a machine's efficiency

Hydraulic systems utilize Bernoulli's principle? true or false

Which statement describes an AC generator? It uses a commutator that causes current to alternate. It produces current that flows in one direction. It produces current that continuously reverses direction.

Consider two rocks with masses of 1 and ten kilograms. What is the relation between their inertia's? Between their masses? Between their weights on earth?

If a cart of 4 kg mass has a force of 8 newtons exerted on it, what is its acceleration?

Why does the liquid thermometer work?

What energy do electrons have when they are farther away from the nucleus?

200 525000 lololo Boat A is 10 km north of a port. Boat B is 5 km east of the same port. Boat A sails in a straight line towards boat B. Work out the bearing on which boat A sails.