You are in an ambulance moving at 75 km/h. If your siren is blaring at 450 Hz and the air temperature is 0.0 °C, what frequency would a pedestrian on the side of the road hear as you are moving away?

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.