Mass Density of Vacuum

Most recent answer: 05/03/2013

Q:
Mass of vacuum?
- Varun (age 15)
India
A:
So far as we can tell from the accelerating expansion of the universe, the mass density of the vacuum is about 6.5*10-27 kg/m3.  If, however, some other effect is causing that acceleration, then we don't know the answer.

Mike W.                                                                                                                                               

(published on 05/03/2013)

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