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weqwewe [10]
3 years ago
12

A girl on the beach sees 8 waves pass in 4 s. If the wavelength of each

Physics
2 answers:
kipiarov [429]3 years ago
8 0

Velocity = frequency x wavelength

              = \frac{8}{4} x 1.2

              = 0.6 m/s

fenix001 [56]3 years ago
5 0

Answer:

The velocity of wave is 2.4m/s.

Explanation:

First, find the frequency using the formula :

f =  \frac{1}{t}

Let t = 4,

f =  \frac{1}{4}

f = 0.25Hz

Next, given that each wave is 1.2m and there are 8 waves so the wavelength is :

λ = 1.2  \times 8

λ = 9.6m

Lastly, you have to use velocity formula :

v = f \times λ \:

Let f = 0.25Hz,

Let λ = 9.6m,

v = 0.25 \times 9.6

v = 2.4

(Correct me if I am wrong)

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Answer:

  • <u><em>1,230N</em></u>

Explanation:

<u>1. Name of the variables:</u>

   f:frequency\\\\ \omega:angular\text{ }speed\\\\ a_c:centripetal\text{ }acceleration\\\\ F_c:centripetal\text{ }force\\ \\ m:mass\\ \\ d:diameter\\ \\ r:radius\\ \\ g:gravitational\text{ }acceleration

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         f=\dfrac{number\text{ }of\text{ }revolutions}{time}

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       f=\dfrac{1}{1.65s}=0.\overline{60}s^{-1}

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