Part 1 of 5 - Question 1 of 5 0.5 Points Two speakers on opposite sides of a con

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Part 1 of 5 -

Question 1 of 5 0.5 Points
Two speakers on opposite sides of a concert stage are producing identical sound waves with a wavelength of 0.8 m. Consider only the direct waves coming straight from the speakers neglecting waves reflected from the ceiling, walls. etc. With only one speaker on at a time, at some point in the audience, the wave from one speaker has a pressure amplitude of 12 N/m2 and the wave from the other speaker has an amplitude of 6 N/m2. With both speakers on, what is the amplitude of the pressure oscillations (in N/m2) if the point in the audience is at equal distances from both speakers?


Part 2 of 5 -

Question 2 of 5 0.5 Points
Same conditions as in the previous question, except the individual amplitudes are 11 and 8 N/m2 and the point in the audience is 0.4 m farther from one speaker than the other. The amplitude with both speakers on is then (in N/m2)


Part 3 of 5 -

Question 3 of 5 1.0 Points
Same conditions as in the previous questions, except the individual amplitudes are 12 and 6 N/m2 and the point in the audience is 0.8 m farther from one speaker than the other. The amplitude with both speakers on is then (in N/m2)


Part 4 of 5 -

Question 4 of 5 1.0 Points
Why must the function generator be precisely tuned to a particular frequency in this experiment?

A. If the frequency is not set to the correct frequency, the wavelength will change.

B. If the frequency is not set to the correct frequency, the speed of sound will change.

C. If the frequency is not set to the correct frequency, the amplitude of the sound wave will be too small.

D. If the frequency is not set to the correct frequency, the amplitude of the sound wave will be too big. Reset Selection

Part 5 of 5 -

Question 5 of 5 2.0 Points
Equations 2 and 3 are supposed to give nearly the same value of ?l. The value using Eq. 3 with r=19 cm, d=6 cm, and ?=30o is 3.0 cm. How much smaller than this (in cm) is the value obtained using Eq. 2? Give your answer to the nearest 0.001 cm.

Explanation / Answer

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