2) Which of the following are examples of projectiles? Choose all that apply. *
-skydiver at terminal velocity
-baseball in the air after being dropped
-helicopter
-baseball in the air after being thrown to first base
-ping pong ball in the air after being dropped
-feather dropped out of a nest

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.