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...
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...
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?
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...
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...
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...