2007-07-07 07:55:45 · 4 answers · asked by osama I 2 in Science & Mathematics ➔ Physics
If you left a box alone, in empty space, it would come to
2.73 degrees Kelvin.
http://adsabs.harvard.edu/abs/2001astro.ph.11163B
That's above absolute zero, 0 Kelvin. You can get below with "laser cooling" check out Bose-Einstein condesates which get down to nanokelvin.
2007-07-07 07:58:43 · answer #1 · answered by supastremph 6 · 0⤊ 2⤋
Zero point energy. TILT. Every allowed electromagnetic mode is populated by half a virtual photon. From where else do you posit finite electrical permittivity and magnetic permeability of the vacuum arise?
Helium under its own vapor pressure remains liquid right down to absolute zero.
2007-07-07 15:00:57 · answer #2 · answered by Uncle Al 5 · 0⤊ 0⤋
Absolute zero = -273 Kelvin
2007-07-07 15:01:37 · answer #3 · answered by Rick 2 · 0⤊ 2⤋
No one knows, it's never been achieved.
In THEORY however, the temperature is expected to be Absolute Zero, -273.15°C (-459.67°F)
2007-07-07 19:53:45 · answer #4 · answered by Norrie 7 · 0⤊ 0⤋