Practice - Superposition

Section 17.7 Practice - Superposition

Subsection Explanation Practice

Explanation 17.7.1. Wave at a Boundary.

Two strings are tied together and a wave is sent down string 1. String 1 has a linear mass density three times smaller than string 2. When the wave reaches the point where the strings are tied together and moves through string 2, you observe the wavelength. Is the wavelength in string 2 greater than, less than, or equal to the wavelength in string 1?

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Subsection ARC*S Practice

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Subsection Numerical Practice

Calculation 17.7.2. Tube of Air.

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A cylindrical tube of air sustains standing waves at 600 Hz, 800 Hz, and 1000 Hz, but at no other frequencies between 600 and 1000 Hz. Which of the following statements are plausible here?

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The fundamental frequency is 50 Hz and the tube is open on both ends.

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The fundamental frequency is 100 Hz and the tube is open on both ends.

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The fundamental frequency is 100 Hz and the tube has one open and one closed end.

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The fundamental frequency is 200 Hz and the tube has one open and one closed end.

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The fundamental frequency is 200 Hz and the tube is open on both ends.

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The fundamental frequency is 200 Hz and the tube is closed on both ends.

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Answer.

E., F.

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Calculation 17.7.3. Speakers.

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Suppose you observe that the shortest non-zero path length difference that produces constructive interference from two coherent unknown sources is \(128 \mathrm{~m}\text{.}\) What is the wavelength of the source?

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At which of the following path length differences will constructive interference also occur?

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