The mass of the rock is 1220 kg. It had 400 J of potential energy when it rolled down the hill. calculate the heihht.

What branch of Science studies matter and energy and the way they work together with force to cause motion

A thin hoop is supported in a vertical plane by a nail. What should the radius of the hoop be in order for it to have a period of oscillation of 1.00 s

As light shines from air to water (n = 1.33) at an incident angle of 45.0 degrees what is the angle of refraction

Is matter a pure substance or mixture

Your gross margin is 60%, your operating expenses are: staffing 35%, rent 10%, miscellaneous 5%. Are you making a profit?

Why do the earth have many states

Problem page a cyclist traveled 20 kilometers per hour faster than an in-line skater. in the time it took the cyclist to travel 80 kilometers, the skater had gone 30 kilometers. find the speed of the skater.

What is emitted during fission

If a magnet is broken into two pieces, what happens to the magnetic poles? One piece will have a north pole, while the other piece will have a south pole. Each piece will still have a north pole and a south pole.

How does a rubber rod become negatively charged through friction? a. It touches a negatively charged object, and protons move off of the rod. b. It touches a positively charged object, and electrons move onto the rod. c.