A ball is rolled uphill a distance of 13 meters before it slows, stops, and begins to roll back. The ball rolls downhill 27 meters before coming to rest against a tree. What is the magnitude of the ball's displacement

If the rate $56 per 7 hours is reduced to a unit rate, the result is dollars per hour.

A medicine ball is dropped from a height of 1 m. It strikes the ground with an energy of 50 J. What is the mass of the medicine ball?

On very dry days, when you use a comb or a brush, your hair sometimes stands on the end and maybe even sticks to the comb or brush. Explain why this happens in terms of electric charge.

Why is reaching activation energy necessary?

Which statement did Niels Bohr make about atoms? A. The atom is made up of smaller particles. B. The energy of an electron depends on its specific orbit. C. The atom has a small, dense center. D. Atoms are different for different elements.

Based on the law of conservation of energy, how can we reasonably improve a machine's ability to do work?

What would happen if cranial nerve IV was damaged.

What two factors determine how bright a star appears to be in the sky?

Vector A has a magnitude of 60 units eastward and vector B has a magnitude of 11 units northward. What is the magnitude of the resultant between vectors A & B?

A team of dogs pulls a sled 15 m using a force 200 n. How much work did the dogs do?