Question

The wavelength of a sound wave in this room is 4. 13 m and the frequency is 75 Hz. What is the speed of the wave in the room?

if you double the frequency of the sound wave but keep the wavelength the same, determine the new speed of the wave.​

Answer 1

Let's see

#1

`\\ \rm\Rrightarrow v=f\lambda`

• f is frequency
• lambda is wavelength

`\\ \rm\Rrightarrow v=75(4.13)`

`\\ \rm\Rrightarrow v=309.75ms^(-1)`

#2

New frequency:-

• 2(75)=150

`\\ \rm\Rrightarrow v=150(4.13)`

`\\ \rm\Rrightarrow v=619.5ms^(-1)`