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Ksivusya [100]
3 years ago
14

What quantity measures the number of complete cycles an oscillation makes per second? A. period B. amplitude C. frequency D. for

ce
Physics
1 answer:
Free_Kalibri [48]3 years ago
8 0

Hello, there Jcparris

Your answer is going to be C. Frequency

If my answer helped please leave a thank rate 5 stars and the most important rank me braiinliest thank you and have a great day!

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An old mining tunnel disappears into a hillside. You would like to know how long the tunnel is, but it's too dangerous to go ins
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Answer:

121.43 m

Explanation:

Solution

Since standing waves are set up, the expression for the first mode of frequency is f₁ = nv/4L. The next mode of frequency is f₂ = (n + 2)v/4L where L is the length of the tunnel and v the speed of sound. f₁ = 5.0 Hz, f₂ = 6.4 Hz, v = 340 m/s. We now subtract f₂ - f₁ = (n + 2)v/4L - nv/4L = v/2L.

So f₂ - f₁ = v/2L. and L = v/2(f₂ - f₁) = 340/[2× (6.4-5.0)] = 340/2×1.4 = 340/2.8 = 121.43 m

So, it is 121.43 m far to the end of the tunnel.

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