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maks197457 [2]
3 years ago
7

Noise-canceling headphones are an application of destructive interference. Each side of the headphones uses a microphone to pick

up noise, delays it slightly, then rebroadcasts the noise next to your ear where it can interfere with the incoming sound wave of the noise. Suppose you are sitting 1.8 m from an annoying, 200 Hz buzzing sound.
Physics
1 answer:
exis [7]3 years ago
4 0
The question for this problem would be the minimum headphone delay, in ms, that will cancel this noise.
The 200 Hz. period = (1/200) = 0.005 sec. It will need to be delayed by 1/2, so 0.005/2, that is = 0.0025 sec. So converting sec to ms, will give us the delay of:Delay = 2.5 ms.
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The articles appearing under "Milestones in Physics" will give an insight into special events or situations that have been decisive for the evolution of Physics

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Please see the attached file.

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An astronaut lands on a new, recently discovered planet in a different star system. The astronaut measures the acceleration due
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Answer:

The radius of the new planet is ~2.04 * 10⁶ m, or 2,041,752 m.

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