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• Users: L1988
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1. ### Amplitude and intensity of rock concert

Homework Statement At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, where you're sitting, increases by 87.0%. By what percentage does the intensity increase? Do not enter unit. Homework Equations...
2. ### Lowest frequency that produces an interference maximum

nevermind, figured it out DISREGARD THE QUESTION!
3. ### Lowest frequency that produces an interference maximum

Homework Statement A microphone is located on the line connecting two speakers that are 0.517 m apart and oscillating 180° out of phase. The microphone is 1.96 m from the midpoint of the two speakers. What is the lowest frequency that produces an interference maximum at the microphone's...
4. ### Find distance using speed of sound

I still don't understand why (1500 m/s) x (2.02s) x (.5) = 1515 m is incorrect for the boat problem
5. ### Find distance using speed of sound

awesome! I got it, final answer = 679.3 Thanks for your help! I don't think I can use this method for the boat question, right? Do you have any suggestions for that?
6. ### Find distance using speed of sound

ok: 759.5 = (h/2) ^2 + h^2 759.5 = (h^2 / 4) + (h)^2 759.5 = (h)^2 (1+1/4) 759.5 = h^2 (1.25) 759.5 / (1.25) = h^2 h^2 = 607.6 h = 24.6 Still incorrect according to the computer
7. ### Find distance using speed of sound

sorry i meant speed of sound 1500 x 2.02
8. ### Find distance using speed of sound

second question: Note: problem says : Take the speed of sound to be 350 m/s. attempt 1: distance = speed x time d = 350 x 2.17 s = 759.5 m attempt 2: using a triangle and pythagorean's theorem 759.5 = r^2 x^2 = "distance equal to one half its altitude above the ocean" x^2= (sqrt...
9. ### Find distance using speed of sound

sorry, I am new to this forum. for the first one I got 1515m 343m/s x 2.02 s = 3030 m 3030m /2 = 1515 m
10. ### Find distance with sound

Two questions: 1. A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 2.02 s later. How deep is the ocean at this point? I assumed this used distance = speed x time. I knew that speed must equal the...
11. ### Find distance using speed of sound

Two questions: 1. A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 2.02 s later. How deep is the ocean at this point? I assumed this used distance = speed x time. I knew that speed must equal the...