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Homework Help: Speed of Group

  1. Jul 15, 2010 #1
    1. The problem statement, all variables and given/known data
    The speed of a group of molecules are 2, 3 , ..... 11 km/sec. find the average speed of the group and also find the R.M>S speed of the group ?

    2. Relevant equations

    3. The attempt at a solution
    by summation of all 2+3+4+... 11 / 11 . is it right ... and how i find RMS speed.
  2. jcsd
  3. Jul 15, 2010 #2


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    Yes, that will give you the average speed of the molecules.

    Start by looking up the definition of the RMS speed in your textbook.
  4. Jul 15, 2010 #3


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    r.m.s. is abbreviation for "root mean square", which means square root of the average for the "squared speeds". just square them all, find the average, and take the sqrt.
  5. Jul 17, 2010 #4
    thanks i got it..
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