Question #431e3

1 Answer
LM
Feb 18, 2018

#70Hz#

Explanation:

#v = flambda#

velocity = frequency * wavelength

when rearranged to make frequency #f# the subject:

#f = v/lambda#

frequency = velocity / wavelength

#v: 420 m//s#

#lambda: 6m#

#v/lambda = (420 m//s)/(6 m)#

#=70Hz#

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