In a relativistic setting, they are one and the same.

Space/Science » in reply to Sounds like an inertialess drive.

David F Mayer — 4/14/2009 10:15:36 PM (archived)

In relativity, energy is not a scalar, but the 0 or time component of the energy-momentum vector. This vector transforms like other vectors in Minkowski space, so the various components have no separable existence. In other words, a change of energy in one reference frame is a change of momentum in a second reference frame and vice versa.

The whole thread (11 posts)

Russian scientists test perpetual motion machine in space - JimO - 4/14/2009 4:59:56 PM
- It does not sound like a perpetual motion machine. - alcaray - 4/15/2009 6:11:37 AM
  - re: It does not sound like a perpetual motion machine. - TB - 4/15/2009 3:51:23 PM
- Sounds like an inertialess drive. - ER - 4/14/2009 8:23:19 PM
  - In a relativistic setting, they are one and the same. - David F Mayer - 4/14/2009 10:15:36 PM
    - I'm not familiar with Minkowski space, - ER - 4/15/2009 12:16:37 AM
      - Yeah man. Physics isnt rhetoric. (n/t) - et - 4/17/2009 6:02:21 AM
      - No direct connection with classical, non-relativistic mechanics. (n/t) - David F Mayer - 4/17/2009 5:38:30 AM
        
        Gas Degeneracyand Pauli Exclusion are not "Classical". - ER - 4/17/2009 11:44:46 AM
        
        I meant "non-relativistic". Sorry. - David F Mayer - 4/17/2009 1:16:49 PM
- This is an April Fool joke, I take it. (n/t) - David F Mayer - 4/14/2009 5:18:24 PM

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