Mackenzie is warming up at volleyball practice by practicing her serves. She hits the ball harder and harder as she warms up. For the system of her arm (with mass=8kg) serving a volleyball (with mass=0.4kg), complete the representations given the information below.
***I don’t know how to fill in the table***(included in the picture)

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects