1. Twospeakers on opposite sides of a concert stage are producingidentical sound
ID: 1744312 • Letter: 1
Question
1.
Twospeakers on opposite sides of a concert stage are producingidentical sound waves with a wavelength of 0.8 m. Consider only thedirect waves coming straight from the speakers neglecting wavesreflected from the ceiling, walls. etc. With only one 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 fromthe other speaker has an amplitude of 6 N/m2. With bothspeakers on, what is the amplitude of the pressure oscillations (inN/m2) if the point in the audience is at equal distancesfrom both speakers?2.
Sameconditions as in the previous question, except the individualamplitudes are 9 and 7 N/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 7 N/m2 and the point in theaudience is 0.8 m farther from one speaker than the other. Theamplitude with both speakers on is then (in N/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, the wavelength will change.
b. If the frequency is not 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, the amplitude of the sound wavewill be too big.
5.
Equations 2 and 3 are supposed to give nearly the samevalue of l. The value using Eq. 3 with r=19 cm, d=7cm, and =30o is 3.5 cm. How much smallerthan this (in cm) is the value obtained using Eq.~2? Give youranswer to the nearest 0.001 cm.Explanation / Answer
nevermind. i got it.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.