Is 100\% vacuum possible?

Practically, it is impossible to make a perfect vacuum. A perfect vacuum is defined as a region in space without any particles.

Can atoms move in a vacuum?

As a decaying atom moves through the vacuum, it really does experience some kind of force resembling friction. So while the atom’s mass (energy) and momentum decrease, its velocity remains constant.

What happens to temperature in a vacuum?

The temperature of an object is usually defined as the average kinetic energy of its constituent particles, and since a vacuum has no constituents its temperature would be zero under this definition.

Is a black hole a perfect vacuum?

A black hole is a point source of matter. It is surrounded by a vacuum, though not a perfect vacuum, usually. Often it has an accretion disk outside the Schwartzchild radius.

How does a vacuum create suction?

The pressure level in the area behind the fan drops below the pressure level outside the vacuum cleaner (the ambient air pressure). This creates suction, a partial vacuum, inside the vacuum cleaner.

What happens to atoms in a vacuum?

If atoms were mostly empty space, we could remove this space and shrink atoms. In reality, atoms do not contain any empty space. Rather, they are filled completely with spread-out electrons, making the shrinking of atoms impossible.

What is vacuum present?

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).

Would a vacuum be cold?

Vacuum is cold in the sense that it has a very steep temperature gradient. It is not cold in the sense that it has particles that have low kinetic energy. Vacuum by definition contains no particles.

Does temperature drop in vacuum?

Temperature does not change in a perfect vacuum because energy would not move, hence halting any possible change in temperature. Temperature can change in an imperfect vacuum, like within space, because such a vacuum has particles within it that allows energy as movement that causes change.