A factory siren indicating the end of a shift has a frequency of 90. 0 hz. The speed of sound is 343 m/s. What frequency is perceived by the occupant of a car traveling towards the factory at 30 m/s?.

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.

Which one of the following research methods can show cause and effect

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?