A roller coaster train with a mass of 500 kg stops at the top of a hill. If the hill is 110 m high, what is the potential energy of the train?

In 1963 Caltech astronomer Maarten Schmidt observed that quasar 3C273 was moving at 15.8 percent of the speed of light away from us and thus conculded it could not be an object in our galaxy since it would have left the galaxy a long time ago at

In the textbook we learned the definition of acceleration, a=Δv/Δt, and we learned that the cause of acceleration involves net force, where a=F/m. Equate these two equations for acceleration and express, for constant mass, FΔt

A 63 kg object needs to be lifted 7 meters in a matter of 5 seconds. approximately how much horsepower is required to achieve this task

Every object that has mass attracts every other object with a gravitational force: It has been proven that the size of the gravitational force increases as the objects' masses increase, but gravitational force decreases rapidly as the distance

Which type of pollution occurs when small particles of soil are suspended in water?

Kai was 200 meters north of the library when he remembered he had to return some books to the library. It took him 200 seconds to do the round trip. Which best describes Kai's roundtrip?

The engine that powers a crane burns fuel at a temperature of 1500 oC. It is cooled by air at a temperature of 20 oC. The crane is used to lift a 1000 kg steel girder 30 m into the air.

The portion of a light ray that falls on a surface is a/an

Give the definition for diffusion. (A) gas molecules mix unequally average distance between collisions (B) gas molecules escape from a container into a vacuum through a small hole (C) gas molecules mix equally (D) gas molecules spread out in a

As resistance goes up, what happens to the current?