Question

Sound waves move through some liquid at a speed of 1500 m/s. If the wavelength is 3 m, what is the frequency of the wave?

Answer 1

Answer:

C.500 Hz

Explanation:

the information we have about the sound wave:

speed: $v=1500m/s$

wavelength: $\lambda = 3m$

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To find the frequency of the wave we need to use the following equation:

$v=f\lambda$

where $v$ is the velocity, $f$ is the frequency, and $\lambda$ is the wavelength.

clearing for the frequency:

$f=\frac{v}{\lambda}$

and susbtituting the values:

$f=\frac{1500m/s}{3m}\\ f=500s^{-1}$

and since the units of frequency in $s^{-1}$ are Hertz [Hz]

the frequency is:

$f=500Hz$

which is option C

Answer 2

Answer:500Hz

Explanation:

Frequency=velocity/wavelength

Frequency=1500/3

Frequency=500Hz