What is the velocity of a wave if there are $25$ $25$ waves in a span of $50 c m$ $50cm$ and their frequency is $60$ $60$ per second?

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Answer 1 · 2017-04-24T13:54:12

Velocity is $60$ $60$ cm/sec.

Veloccity of wave is frequency multiplied by wavelength.

As wavelength is $\frac{50}{25} = 2$ $50/25=2$ $c m .$ $cm.$

and frequency is $30$ $30$ $h z .$ $hz.$

Velocity is $30 \times 2 = 60$ $30xx2=60$ cm/sec.

Answer 2 · 2017-04-24T13:54:28

0.60 m/s

Since there are 25 waves in 50cm,
wavelength

$λ = \frac{0.50}{25} = 0.020 m$ $lamda=0.50/25=0.020m$ .

We know that $v = f λ$ $v=flamda$

so

$v = (30) (0.020) = 0.60 \frac{m}{s}$ $v=(30)(0.020)=0.60m/s$ .

What is the velocity of a wave if there are 2525 waves in a span of 50cm50cm and their frequency is 6060 per second?