A sound played from a speaker is heard at an intensity of 100W from a distance of 5m. When the distance from the speaker is doubled, what intensity sound will be heard?

What is the beat frequency between a 305Hz and a 307Hz sound?

Consider a 37cm long harp string with a fundamental frequency of 440Hz.

Calculate the speed of the standing wave created by plucking this string.

The ukulele is a short instrument, relative to a guitar. How does this affect the frequencies of sounds that these two instruments produce? Assume the two instruments use the same strings.

Consider a 37cm long harp string with a fundamental frequency of 440Hz.

If only half of the string is allowed to vibrate, what frequency will be heard?

A guitar player hits a wrong note. The note he's supposed to hit is , but he's sharp and the note turns out to be . Starting from rest, how fast (and in which direction) do you have to run until the note sounds correct to you?

A student at a concert notices that a balloon near the large speakers moving slightly towards, then away from the speaker during the low-frequency passages. The student explains this phenomenon by noting that the waves of sound in air are __________ waves.

The speed of sounds is the fastest in which of the following media?

Consider a 37cm long harp string with a fundamental frequency of 440Hz.

What is the wavelength of the second harmonic of the string?

You are standing on the sidewalk when a police car approaches you at with its sirens on. Its sirens seem to have a frequency of 500 Hertz. After the police car passes you and is driving away, what will be the new frequency you hear?