A police car siren emits a frequency of 3900 Hz while driving down the road at a speed of 27.4 m. What frequency will a pers driving a car at 20.7 m in the opposite direction behind the police car hear?
fos
Hz

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds

3is a crest4 is a trough 2 is the amplitude 1 is the wavelength

Dis the

Pe = 1/2k(x)^2  and .05n/m = .05x10^-9m = x