Help please 30 points! What is the angular speed and the tangential velocity at the edge of a disk with a radius of 12.5 cm if it
completes 10 revolutions in 4.18 s?

(Show work)

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.