Question #2808f

1 Answer
May 23, 2015

The velocity of sound is equal to its wavelength times its frequency in Hz. #v=lambdaf#, where #lamba# is the wavelength and #f# is the frequency. 1 Hertz=#1/"s"#

Scientists have detected infrasonic sound waves with frequencies as low as 13 Hz being produced by elephants. Assuming a speed of sound of 350 m/s, determine the wavelength of these sound waves.

Given:
#f=13"Hz"=13/"s"#
#v=350"m/s"#

Unknown:
#lambda#

Solution:
Solve #v=lambdaf# for #lambda# .

#lambda=v/f=(350m/cancel(s))/(13/cancel"s") = 27"m"#

http://www.physicsclassroom.com/calcpad/sound/problems