A police car is approaching you at 26 m/s while you are at rest. The rest frequency of the siren is 1000 Hz. The speed of sound in air is 343 m/s. What frequency do you observe for the siren as the police car is approaching?

A train is moving parallel to a highway with a constant speed of 20 m/sec. A car is traveling in the same direction as the train with a speed of 30 m/sec. The car horn sounds at a frequency of 510 Hz, and the train whistle sounds at a frequency of 320 Hz. . A.When the car is behind the train, what frequency does the driver observe for the train whistle? (Treat the train whistleas the sound source, the driver as the listener. B.When the car is in front of the train, what frequency does the passenger on the train observe for the car horn just afterthe car passes? ( Treat the car as the sound source, passenger as the I istener.

A bat is using echolocation to find insects at night. If the bat emits a high frequency chirp and hears an echo 0.031 s later, how far away is the insect? The temperature of the air that night is 24°C.

An ambulance with a siren (f = 1.00kHz) blaring is approaching an accident scene. The ambulance is moving at 70.00 mph. A nurse is approaching the scene from the opposite direction, running at vo = 7.00 m/s. What frequency does the nurse observe? Assume the speed of sound is v = 343.00 m/s.