A moving source of Sound or a moving observer experiences an apparent shift in f

Question

A moving source of Sound or a moving observer experiences an apparent shift in frequency called the a) fundamental frequency b) wave front effect c) shock wave d) Doppler effect 7. A 520 Hz tone is sounded at the same time as a 515 Hz tone. What is the beat frequency in Hz? a) 1035 b) 5 c) 1.01 d)2.7x10^5 8. A submarine sends out a sonar signal which bounces off a ship and returns 2.2 sec after the time it is sent. How far away is the ship? (speed of sound in seawater is 1530 m/s) 9. A sound wave whose frequency's 260 Hz moves with a speed of 330 Ms. What is the wavelength in meters? 10 The earth's magnetic field: a) has undergone many reversals in polarity b) has always been as it is now c) is created just beneath the earth's north pole d) is created Just beneath the earth's south pole

Explanation / Answer

#6) doppler effect

#7) 520-515 = 5

#8) v = 2d/t

d = v*t/2 = (1530*2.2)/2 = 1683 m

#9)

? = v/f = 330/260 = 1.269 m

#10)

option b ) has always been as it is now

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