Question

A sound wave travels at 379 m/sec and has a wavelength of 8 meters. Calculate its frequency and period.

Answer 1

`\qquad\qquad\huge\underline{{\sf Answer}}`

Wavelength, Wavespeed and frequency depends on each other in the following way :

`\qquad \sf  \dashrightarrow \: frequency = (wave \: \: velocity)/(wavelength)`

`\qquad \sf  \dashrightarrow \: f = (389)/(8)`

`\qquad \sf  \dashrightarrow \: f \approx 48.62 \: \: hertz`

And we know the Reciprocal relationship between frequency and period ~

So, let's find it's period •

`\sf{\qquad \sf  \dashrightarrow \: t = (8)/(389)}`

`\sf{\qquad \sf  \dashrightarrow \: t \approx 0.02 sec }`