no 17 legial Calculator McDonald\'s New dropbox e Robin Cheg ?(758) Mr. Raja (20

Question

no 17

legial Calculator McDonald's New dropbox e Robin Cheg ?(758) Mr. Raja (2018) D perfect Romeo (20 ? M. Laidlaw-P111-Spring 2018 6 Use the following information for questions 15-17: Two sound sources are separated by 9.0m and emit sound in phase with frequency 170Hz. The speed of sound in air is 340. An observer moves along a line perpendicular to the line between the two sound sources. The distance from the observer to the first sound source is di, and to the second is d2. This is illustrated in the figure below. d2 TH 15. What is the condition for there to be coustructive interference

Explanation / Answer

for Destruitve interference

dx = (m+1/2) L

for minimum m = 0

so d x = L/2

here L = wave length = V/f

L = 340/170 = 2

d2 = 2/2 = 1

d^2 = 1^2 + 9^2

d = 9.06 m

option B

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