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This question is really confusing can i get some leads to help me out please and thank u

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- Thread starter xuhhad
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- #1

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This question is really confusing can i get some leads to help me out please and thank u

- #2

CWatters

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Make three drawings showing a string vibrating at the first, second and third harmonic.

Hint: Third harmonic has three antinodes.

http://en.wikipedia.org/wiki/Vibrating_string

Mark the wave length on the drawing of the third harmonic.

http://en.wikipedia.org/wiki/Wavelength

The question is presumably telling you that one wavelength is 45cm.

Apply basic maths to calculate the length of the string.

I'll let you work it out but I make the answer a number between 60cm and 70cm.

Hint: Third harmonic has three antinodes.

http://en.wikipedia.org/wiki/Vibrating_string

Mark the wave length on the drawing of the third harmonic.

http://en.wikipedia.org/wiki/Wavelength

The question is presumably telling you that one wavelength is 45cm.

Apply basic maths to calculate the length of the string.

I'll let you work it out but I make the answer a number between 60cm and 70cm.

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CWatters

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OK i understand but i still don't no what formula to use.

- #5

CWatters

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One wave length = two half wave lengths = 45cm

So three half wave lengths = 3/2 * 45cm = 67.5cm

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