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Seen 1 years ago Jack Connor 1 answers

1.Twospeakers on opposite sides of a concert stage are producingidentical sound waves with awavelength of 0.8 m. Consider only thedirect waves coming straight from the speakers neglecting wavesreflected from the ceiling, walls. etc. With onlyone speaker on ata time, at some point in the audience, the wave from one speakerhas a pressure amplitude of 12 N/m2 and the wave fromtheother speaker has an amplitude of 6 N/m2. With bothspeakers on, what is the amplitude of the pressure oscillations (inN/m2) ifthe point in the audience is at equal distancesfrom both speakers?


2.Sameconditions as in the previous question, except the individualamplitudes are 9 and 7N/m2 and the point in theaudience is 0.4 m farther from one speaker than the other. Theamplitude with both speakers on is then(inN/m2)
3.Sameconditions as in the previous questions, except the individualamplitudes are 10 and 7N/m2 and the point in theaudience is 0.8 m farther from one speaker than the other. Theamplitude with both speakers on is then (inN/m2)

4.Why must the function generator be precisely tuned to aparticular frequency in this experiment?

a. If the frequency is not set to thecorrect frequency, thewavelength will change.
b. If the frequency isnot set to thecorrect frequency, the speed of sound will change.
c. If the frequency is not set to thecorrect frequency, the amplitude of the sound wave will be toosmall.
d. If the frequency isnot set to the correct frequency, theamplitude of the sound wavewill be too big.
5.Equations 2 and 3 are supposed to give nearly the samevalue of Δ l. The value usingEq. 3 with r=19 cm, d=7cm, and θ=30o is 3.5 cm. How much smallerthan this (in cm) is the value obtained using Eq.~2? Giveyouranswer to the nearest 0.001 cm.

Seen 9 months ago Smith Jones 1 answers

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