A 0.050 kg tennis ball initially moving at 15 m/s toward you. You return the shot and plot the force exerted on the ball (shown right). What is the velocity of the return shot?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by