What frequency is received by a mouse just before being dispatched by a hawk flying at it at 25.0 m/s and emitting a screech of frequency Hz? Take the speed of sound to be 331 m/s.
A commuter train approaches a crossing and blows its horn to make a note of frequency 200 Hz. An observer at the crossing measures the frequency of the train’s horn as 208 Hz. The speed of sound in the train’s vicinity is 335 m/s.
What is the speed of the train?
If the train’s speed remains constant, what frequency does the observer measure as the train recedes from them?
An ambulance with a siren 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 . What frequency does the nurse observe? Assume the speed of sound is .
What is the minimum speed at which a source must travel toward you for you to be able to hear that its frequency is Doppler shifted? That is, what speed produces a shift of on a day when the speed of sound is 331 m/s?
Two eagles fly directly toward one another, the larger eagle at a speed of 15.0 m/s and the smaller one at a speed of 20.0 m/s. Both eagles screech, the larger emitting a screech of frequency of Hz and the smaller one emitting a screech of frequency Hz. The speed of sound in the air around the eagles is 330 m/s.
What is the frequency of the screech heard by the larger eagle?
What is the frequency of the screech heard by the smaller eagle?