What is the speed of sound in air?

Question

The lowest vocal note in the classical repertoire is low D (f = 72.7 Hz), which occurs in an aria in Mozart’s opera Die Entführung aus dem Serail. If
low D has a wavelength of 4.2 m, what is the speed of sound in air?

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Answer 1 · 2018-04-13T01:09:01

The speed of a wave #v#, its wavelength #lambda#, and its frequency #f# is related by the formula #v=flambda#.

Thus, the speed of sound in air is
#v=flambda#

#\ \ =72.7*4.2#

#\ \ =305.34"m"/"s"#