So in this sense
yes the vacuum does have a mass
. However your example of the box of vacuum suggests we might be able to somehow weigh this extra mass, and of course we can do this because the vacuum is everywhere.
Does a vacuum have mass?
In classical physics, the vacuum is the absence of mass-energy, so
no, it does not have mass
. The very definition of the classical vacuum is that its “stress-energy-momentum tensor”, the quantity that measures, among other things, its mass-energy content, is identically zero.
What is the mass of vacuum?
Mass of vacuum? 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/m
3
.
Does the vacuum of space have matter?
Vacuum, space in which
there is no matter
or in which the pressure is so low that any particles in the space do not affect any processes being carried on there. It is a condition well below normal atmospheric pressure and is measured in units of pressure (the pascal).
Is the vacuum of space dense?
Outer space is not completely empty—it is a hard vacuum containing
a low density of particles
, predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays.
Is a perfect vacuum possible?
A vacuum is defined as a space devoid of all matter. … Ultimately,
a perfect vacuum isn't possible
because quantum theory dictates that energy fluctuations known as ‘virtual particles' are constantly popping in and out of existence, even in 'empty' space.
How strong is the vacuum of space?
Vacuum quality Torr Atmosphere | Ultra high vacuum 1×10 − 9 to 1×10 − 12 9.87×10 − 13 to 9.87×10 − 16 | Extremely high vacuum − 12 − 16 | Outer space 1×10 − 6 to − 17 9.87×10 − 10 to − 20 | Perfect vacuum 0 0 |
---|
Is space a 100% vacuum?
Space is an almost perfect vacuum, full of cosmic voids. … But the vacuum of space is the opposite. By definition, a vacuum is devoid of matter. Space is
almost an absolute vacuum
, not because of suction but because it's nearly empty.
What does space smell like?
In a video shared by Eau de Space, NASA astronaut Tony Antonelli says space smells
“strong and unique
,” unlike anything he has ever smelled on Earth. According to Eau de Space, others have described the smell as “seared steak, raspberries, and rum,” smokey and bitter.
What keeps space empty?
A point in outer space is filled with
gas, dust
, a wind of charged particles from the stars, light from stars, cosmic rays, radiation left over from the Big Bang, gravity, electric and magnetic fields, and neutrinos from nuclear reactions. …
How much hydrogen is in empty space?
A hydrogen atom is
about 99.9999999999996% empty space
. Put another way, if a hydrogen atom were the size of the earth, the proton at its center would be about 200 meters (600 feet) across.
Does space ever end?
Many think it's likely you would just keep passing galaxies in every direction, forever. In that case, the universe would be infinite,
with no end
. … Scientists now consider it unlikely the universe has an end – a region where the galaxies stop or where there would be a barrier of some kind marking the end of space.
How dense is deep space?
“It averages roughly
1 atom per cubic centimeter
, but density as great as 1000 atoms/cm
3
and as small as 0.1 atom/cm
3
have been found.”
What is the highest vacuum possible?
Because the maximum theoretical vacuum at sea level is
29.92 in. -Hg
, actual pump capabilities are based on and compared to this theoretical value. Depending on pump design, the vacuum limit ranges from 28 to 29.5 in.
What is considered a perfect vacuum?
In the U.S., the common standard to measure rough vacuum is inches of mercury
Is there energy in vacuum?
The vacuum energy is a special case of zero-point energy that relates to the quantum vacuum. … Using the upper limit of the cosmological constant, the vacuum energy of free space has been estimated to be 10
− 9
joules (10
− 2
ergs), or
~5 GeV per cubic meter
.