A woman who doesn't appreciate the improper advances of a rude thug blasts him with some pepper spray. She then screams. The frequency of
her scream is a piercing 1,000 Hz on an evening when the air temperature
is a brisk 10°C. If the thug starts sprinting away from the woman at a
speed of 7 m/s what frequency will he hear?

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.