While doing an experiment, Tom drops a ball out of a window 2.3 meters above the ground. The instant he does this he fires a starters pistol. Jerry sees the ball hit the ground at the instant he hears the pistols shot. The speed of pistol’s sound is 334 m/s -it is constant and will not change. a. How long did it take for Tom’s ball to reach the ground? b. How far away was Jerry standing?

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.