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 Atoms

  1. May 3, 2009 #1
    How fast does an atom vibrate in m/s. I have found how fast it vibrates in hz but I'm trying to convert that to speed. Thanx.
     
  2. jcsd
  3. May 4, 2009 #2

    Matterwave

    User Avatar
    Science Advisor
    Gold Member

    You can't express a frequency in m/s

    Frequency is expressed in Hz, or /s. The units are not compatible.
     
  4. May 4, 2009 #3
    You can get a rough estimate by assuming the vibrations are simple harmonic.The velocity varies between zero and a maximum of 2pi*frequency*amplitude of vibration.(as matterwave pointed out it was probably the frequency that you found)
     
  5. May 4, 2009 #4
    Thermal neutrons (mass = 1 AMU) have an rms velocity of about 2200 meters per second at room temperature. Heavier molecules like N2 have an rms velocity of 2200/sqrt (28)where 28 is the gram molecular mass of nitrogen molecule. The relation is (1/2) m v2 = kT where k is Boltzmann's constant and T is in kelvin.

    Boltzmanns constant = 1.38 x 10-23 Joules per degree kelvin
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Speed of Atoms
  1. Atomic Decay (Replies: 2)

  2. Atomic Model (Replies: 15)

  3. Polarity in atoms (Replies: 5)

  4. Atomic Spin (Replies: 2)

  5. Hydrogen atom (Replies: 3)

Loading...