Useful Numbers: speed of sound in air vair =344 m/s.
1) A woman stands 1.2m from speaker A and 2.1m from speaker B. If speakers A and B are out-of-phase, what is the lowest frequency that will destructively interfere at the woman's position?
2) A 440Hz tuning fork is sounded along with the A string on a piano. A beat frequency of 1.5Hz is measured. What are the possible frequencies of the A string?
3) The formula for the Doppler shift is:
If the source is going away from the observer and the observer is going toward the source, what is the numerator sign?
What is the denominator sign?