At a country music festival in New Hampshire, the Oak Ridge Boys are playing at the end of a crowded 184-m field when Ronny Fairchild hits a note on the keyboard that has a frequency of 400. Hz. a) How many full wavelengths are there between the stage and the last row of the crowd?

b) How much delay is there between the time a note is played and the time it is heard in the last row?

Question

Hillary Davidson

Physics

11 October, 07:06

At a country music festival in New Hampshire, the Oak Ridge Boys are playing at the end of a crowded 184-m field when Ronny Fairchild hits a note on the keyboard that has a frequency of 400. Hz. a) How many full wavelengths are there between the stage and the last row of the crowd?

b) How much delay is there between the time a note is played and the time it is heard in the last row?

+5

Answers (1)

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Reynaldo Kirby · Answer 1

a)

wavelength = velocity of sound / frequency

= 340 / 400 m

=.85 m

No of full wavelengths required = 184 /.85

= 216.47

b) Time taken by sound to travel a distance of 184 m

distance / velocity

= 184 / 340 s

=.54 s.