1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Speed of Sound and Mac

  1. Oct 28, 2007 #1
    Speed of Sound and Mach

    1. The problem statement, all variables and given/known data
    You are hired as the physics consultant for a large movie studio. The producer is way over budget and wants to perform some special effects that will save him money. He decides to shoot the dramatic action boat chase scene with the boats going at 1/4 the speed of what will be seen on film. He quadruples the speed of playback. Explain why or why not this will work.

    2. Relevant equations

    Mach # = velocity of boat/ speed of sound
    Speed of sound = 331 + 0.60*T
    T = temperature

    3. The attempt at a solution

    I don't even know where to begin. I don't think it will work, but maybe if someone could point me in the right direction?
    Last edited: Oct 28, 2007
  2. jcsd
  3. Oct 28, 2007 #2


    User Avatar
    Homework Helper

    I think the idea is that the sound won't be right. What happens to the frequency of the sounds heard when playback is quadrupled?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook