Two speakers create identical 288 Hz sound waves. A person is 1.47 m from Speaker 1. What is the minimum distance to Speaker 2 for there to

Question

Two speakers create identical 288 Hz sound waves. A person is 1.47 m from Speaker 1. What is the minimum distance to Speaker 2 for there to be constructive interference at that spot?

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Diễm Thu 1 week 2021-07-21T13:06:05+00:00 1 Answers 2 views 0

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    2021-07-21T13:07:57+00:00

    Answer:

    2.90 meters

    Explanation:

     

    Distance of speaker 2 =?

    Distance of speaker 1 = 1.47m

    Velocity = 343

    f = 240Hz

    For constructive interference to occur:

    Difference in distance or path = wavelength

    For minimum distance, n = 1

    Distance 2 – distance 1 = nλ

    Recall λ = v/f

    V = Velocity ; f = frequency

    Distance 2 – distance 1 = v/f

    Distance 2 – 1.47 = (343/240)

    Distance 2 = 1.429 + 1.47

    Distance 2 = 2.899 meters

    Minimum Distance of speaker 2 for their to be constructive interference = 2.90meters

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )