A book with a mass of 2.5 kg falls from a high shelf in a library. At a height of 2.0 meters its velocity is 2 m/s. What is the mechanical energy of the book?

Answers are:

5J

44J

49J

54J

What is a long distance surface current?

Which of the following is true about diffraction? a. Sounds with a larger wavelength bend around obstacles more easily. b. Sounds with a smaller wavelength bend around obstacles more easily. c.

The epicenter of an earthquake is located in a sandy desert region. Seismic waves move outward from the epicenter. A rocky region is located a few hundred miles from the desert.

If we see a supernova of a star that is 25 light years away from us, we know it exploded 25 years ago. True False

What may have been the first step in the formation of the solar system?

At what temperature did the substance in the test tube into a solid?

What occurs when the velocity of Earth is doubled? a. The orbit of Earth around the Sun becomes smaller b. The orbit of Earth does not change c. The Earth escapes the Sun d. The orbit becomes more elliptical

When is a body said to be at rest

27. Calculate the impulse when an average force of 10 N acts on a cart for 5.0 s.

A boy on a bicycle is resting at the top of a hill then he rides his bicycle down the hill describe how the boy potential and kineti energy differ at the top middle and bottom of the him