Question

if the peroid of a wave is 20 miles per second and its wavelength is 4cm calculate
a) the frequency of the wave:
b) the velocity of the wave:

ps. can this be answered as soon as possible

Answer 1

Answer:

As we know,Frequency is the number of vibrations done in one second.

In this case, there are 20 miles in one second which means ➠

$= > f = \frac{20}{1}$

So, here comes the answer of our first part which is 20.

(Let the wavelength be w here)

Wavelength here is given in cm, so we need to convert it in m(S.I unit)

Now, we have to calculate speed or velocity-

$v = fw$

$= 20 \times \frac{4}{100}$

$= \frac{4}{5}$

$= 0.8m/s \:$

тнαηк уσυ!