A student has been transported by aliens to a time loop. She must run 8.5 loops around a 100 m radius circular track in order to escape. She starts at the far north side of the track. Please tell her the total distance and displacement she will travel in this endeavor (if she doesn't have enough energy, she will be stuck in the time loop forever).

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.