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Math Help - Special relativity - time dilation

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    Special relativity - time dilation

    Unbelievably high energy particles, called cosmic rays, are continuously bombarding our atmosphere and producing unstable particle particles known as muons. The image below shows one such muon detected by the ATLAS particle physics detector at the LHC. The average lifetime for a muon, at rest, is 2.2 Ás. If the muons from cosmic rays are produced travelling at 0.99956c (c=speed of light in vacuum) how long do they live, on average, before decaying?

    [Specify units of 's', 'ms' or 'us' (Ás) in your answer.]



    I based this question off of the time dilation


    and since they are saying its at rest
    would I assume that v^2/c^2 is zero?
    and simply the equation is 2.2 micro seconds/ 1?
    Attached Thumbnails Attached Thumbnails Special relativity - time dilation-18844f681b0e225b8db14573c2a4fdb8.png  
    Last edited by mr fantastic; November 17th 2009 at 03:07 PM. Reason: Changed post title
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