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3 years ago

A wave of wavelength 0.3 m travels 900 m in 3.0 s. Calculate its frequency.

Physics

1 answer:

Crank3 years ago

8 0

Answer: 1000 Hz

Explanation:

You can calculate frequency by dividing velocity by wavelength

Frequency = velocity/wavelength

Find velocity first.

900 m/3 s = 300 m/s

Plug values in to find frequency.

F = (300 m/s)/0.3 m

F = 1000 Hz

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Answer:

$E_y=1175510.2\ N.C^{-1}$

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Explanation:

Given:

side of a square, $a=52.5\ cm$

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$E=\frac{1}{4\pi\epsilon_0}\times \frac{q}{b^2}$

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$E_1=9\times 10^9\times \frac{45\times 10^{-6}}{0.3712^2}$

$E_1=2938775.5\ N.C^{-1}$

Force by each of the charges at the remaining corners:

$E_2=E_3=E_4=9\times 10^9\times \frac{27\times 10^{-6}}{0.3712^2}$

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$E_y=E_1-E_4$

$E_y=1175510.2\ N.C^{-1}$

Now, net electric field in the horizontal direction:

$E_y=E_2-E_3$

$E_y=0\ N.C^{-1}$

So the Magnitude of electric field is in the upward direction as shown directly towards the charge $q_1$ .

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