(a) Compare the shift in frequency if a 2000-Hz source is moving toward you at 15m/s, versus you moving toward it at 15 m/s. Are the two frequencies exactly the same? Are they close?
(b) Repeat the calculation for 150 m/s and the again
(c) For 300 m/s. What can you conclude about the asymmetry of the Doppler formulas?