A2-kg book falls off a shelf. it hits a student traveling 2 m/s. how much kinetic energy does the book have?

8 j

2 j

1 j

4 j

Which statement best describes who the period and frequency of electromagnetic was change between gamma rays and microwaves? a) the period and frequency stay the same. b) the period increases and the frequency decreases. c) the period decreases and the frequency increases. d) the period increases and the frequency increases.

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?