Aball with a mass of 5 kg is acted upon by a force of 20 n. if the ball begins moving from a velocity of 0 m/s and accelerates for 2 seconds, what is its change in velocity? a. 0 m/s b. 2 m/s c. 4 m/s. d. 8 m/s

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?