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# Sound in a Tube

## Sound waves trapped in a tube generate sounds a frequencies dependent on the length of the tube.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
• Video

## Harmonics 2: Standing Waves in a Closed Air Column - Overview

by CK-12 //basic
Overview
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## Harmonics 3: Standing Waves in an Open Air Column - Overview

by CK-12 //basic
Overview
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## Harmonics 2: Standing Waves in a Closed Air Column - Example 3

by CK-12 //basic
Determining harmonic (resonant) frequencies using the equation f[n] = nv / 4L or f[n­ ]= nf[1] for any odd integer n
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• Video

## Harmonics 3: Standing Waves in an Open Air Column - Example 3

by CK-12 //basic
Determining harmonic (resonant) frequencies using the equation f[n] = nv / 2L or f[n­ ]= nf[1] for any integer n
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• Video

## Harmonics 2: Standing Waves in a Closed Air Column - Example 1

by CK-12 //basic
Determining the length of a tube based on the standing wave frequency or wavelength
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## Harmonics 2: Standing Waves in a Closed Air Column - Example 2

by CK-12 //basic
Determining harmonic (resonant) wavelengths using the equation λ[n] = 4L/n or λ[n] = λ[1]/n for any odd integer n
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• Video

## Harmonics 3: Standing Waves in an Open Air Column - Example 1

by CK-12 //basic
Determining the length of a tube based on the standing wave frequency or wavelength
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• Video

## Harmonics 3: Standing Waves in an Open Air Column - Example 2

by CK-12 //basic
Determining harmonic (resonant) wavelengths using the equation λ[n] = 2L/n or λ[n] = λ[1]/n for any integer n
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