A piano tuner hears one beat every when trying to adjust two strings, one of which is sounding . How far off in frequency is the other string?

Two piano strings are supposed to be vibrating at , but a piano tuner hears 4 beats every 3 seconds when they are played together. If one of the piano strings is vibrating correctly at , what must be the frequency of the other?

Resonance in a system, such as a string fixed on both ends, occurs when

Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency on one of the tones is increased?

An ambulance turns on its siren as it is driving away from you. What happens to the sound pitch?

Two identical waves are superimposed with destructive interference. What will happen to the resulting wave?

Two waves, each with an amplitude of are superimposed with constructive interference such that they are in phase. What is the resultant amplitude?

Two waves, one with an amplitude of and the other of are superimposed with destructive interference. What is the resultant amplitude?

The siren of a police car at rest emits a frequency of about . What frequency will you hear if you are at rest and the police car moves away from you?