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  3. (1) parasaurolophus was a dinosaur whose distingui

(1) Parasaurolophus was a dinosaur whose distinguishing feature was a hollow crest on the head. The...

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Physics

(1) Parasaurolophus was a dinosaur whose distinguishing featurewas a hollow crest on the head. The 1.2m long hollow tube in thecrest had connections to the nose and throat, leading someinvestigators to hypothesize that the tube was a resonant chamberfor vocalization. (Figure 1)

If you model the tube as an open-closed system, what are thefirst three resonant frequencies? (Use 350 m/s for the speed ofsound.)

Enter your answers using two significant figures in ascendingorder separated by commas.

(2) Tendons are, essentially, elastic cords stretched betweentwo fixed ends; as such, they can support standing waves. Theseresonances can be undesirable. The Achilles tendon connects theheel with a muscle in the calf. A woman has a 20-cm-long tendonwith a cross-section area of 120mm2. The density of tendon tissueis 1100 kg/m3.

For a reasonable tension of 600N , what will be the fundamentalresonant frequency of her Achilles tendon?

Express your answer to two significant figures and include theappropriate units.

Answer & Explanation Solved by verified expert
4.3 Ratings (691 Votes)
1 Given that length L12m speed of the sound is v350ms the first resonant frequency is f1v4L    See Answer
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