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Homework Help: Somebody help me with wave

  1. May 9, 2004 #1
    Hi all,
    can anybody pls explain what is reduce the wave speed by factor of 2?

    original v(string) = 265m/s
    F (tension) = 500N
    m (mass) = 0.005kg
    l (length) = 0.7m

    v = sqrt of [F / (m/l)]
    therefore m = (F * l) / v square

    but I though reduce speed by the factor of 2 = divided by 2?? pls kindly advise.
  2. jcsd
  3. May 9, 2004 #2
    Reduce by a factor of 2 does mean divide by 2.

  4. May 9, 2004 #3
    Hi Cookiemonster,
    that's what I thought, but when I did the equation, the answer I got is 20g but the answer is 15g... can you explain that?
  5. May 9, 2004 #4
    What exactly is the question? I thought all you asked was what reducing by a factor of 2 meant.

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