Question

Question #09177

Answer 1

The speed of the wave is `208(mm)/s`

Explanation:

The wavelength `lamda` is `13mm` and the frequency `f` is `16hz`.

Remember the wavelength is a measure of one cycle of the wave.
Then the `13mm` wavelength can be thought of as `13(mm)/c`

We also know that `16hz` is the name given to `16c/s` or cycles per second.

The formula relating wavelength, frequency and speed is:

`lamda=v/f`

Then: `13mm=v/(16hz)`

From above we can write it: `13(mm)/c=v/(16c/s)`

Then: `v=13(mm)/cancel(c)*16 cancel(c)/s`

v=`208(mm)/s`

Answer 2

.

Explanation:

The velocity of a wave equals to its frequency multiplied by its wavelength.
`v=f lambda`

`v= 16` x `13` x`10^-3` (13mm = `13/1000`m)
`v = 0.208ms^-1`