A string is stretched between two fixed points and set into...

A string is stretched between two fixed points and set into oscillation. The frequency of the vibrating string is not dependent on A the amplitude of the string's vibration. B the length of the string. C the mass per unit length of the string. D the tension in the string.

Transcript

00:01 Okay, so we've got a multiple choice question here with four choices, a, b, c, and d.

00:05 I think the best thing would be to go through them one by one and determine whether they're true or false.

00:10 You can have more than one possible answer on this one.

00:14 So the frequency of a vibrating string is not dependent upon what.

00:18 There are three main equations that we can look at with waves.

00:22 Speed is equal to frequency times wavelength, and the speed depends on the medium.

00:30 And then the frequency is usually controlled by a source.

00:34 So whatever is creating the wave.

00:36 And then the wavelength sort of responds to the frequency.

00:38 So i'll just put response.

00:41 We do have other equations like speed is equal to square root of tension over mu, which is the linear density.

00:48 So the speed can depend on the medium, depending on the tension of a string, or the density, et cetera.

00:56 So let's go through the choices here.

00:58 For choice a, the amplitude.

01:00 Of the string's vibration.

01:02 So that would be a no.

01:03 The speed does not depend on that.

01:05 So the question is asking for, which one does the frequency not depend on? it's actually i'm about frequency.

01:12 Frequency of a string does not depend on amplitude.

01:15 So that's true.

01:15 The frequency is only going to depend upon how quickly the waves are produced...

Question

A string is stretched between two fixed points and set into oscillation. The frequency of the vibrating string is not dependent on A the amplitude of the string's vibration. B the length of the string. C the mass per unit length of the string. D the tension in the string.

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