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Gravity and Pressure

  1. Mar 26, 2009 #1
    So, ideal gas under a high pressure produces more gravity because of the pressure components in the stress-energy tensor.

    However, high pressure of an ideal gas can be explained as just moving particles. These particles can be quite big and heavy - for example, stars in a galaxy.

    I wonder how these views might be consistent. Why moving particles generate more gravity? just because their relativistic mass is bigger?
  2. jcsd
  3. Mar 26, 2009 #2
    The stress energy tensor reflects mass,energy and pressure as sources of gravity....and negative pressure as a cause of repulsive gravity....so it's not as simple as the relativistic energy of moving particles....
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