2. An 800-g bird has 47.0 J of gravitational potential

energy when it is perched high up in a tree.

Calculate the bird's vertical height from the ground.

9. A woman runs a kilometer using a force of 210N and a power output of 500W. How long in minutes does it take this woman to complete 1 kilometer?

How does something become charged using friction?

Any rocks formed when another rock is changed by heat or pressure is a metamorphic rock false or true?

Are there classes of inclined planes?

What will happen to a waves frequency if it's speed increases and it's wavelength remains the same?

What happens to the motion of an object when the forces acting on it are balanced? A. The motion changes. B. The motion does not change. C. The motion speeds up. D. The motion slows down.

An object with a temperature of 0 Kelvin would not emit radiation. a. True b. False

When a bar magnet is broken into two pieces each piece has a north and south pole because a the magnetic fields reversed b every magnet is made of many aligned smaller magnets с bar magnets are permanent magnets d the magnetic poles have been

A box is being pulled to the right. What is the direction of the gravitational force?

An electron, starting from rest and moving with a constant acceleration, travels 2.0 cm in 5.0 ms. What is the magnitude of this acceleration?