New answers tagged vacuum
Supposing that the explosive does not contain shrapnel, supposing too that even after the impelling fragments do not encounter liquid, solid or gaseous or electro magnetic field media which all resist and absorb to some degree the released energy--one must consider the fact that such released energy is not radioactive or electromagnetic radiation but merely ...
Smoothed particle hydrodynamics (SPH) is a fluid simulation approach that has been initially developed for astrophysics fluids (galaxies, nebula, exploding stars...), showing huge range of possible "densities", and embedded in ambient vacuum. see https://en.wikipedia.org/wiki/Smoothed-particle_hydrodynamics
This is how brake boosters on cars work. The check valve will obviously leak slowly over time, but it can last several minutes, perhaps hours, and a better-designed system could likely last longer depending on your application. There's no such thing as "vacuum" in some tangible sense. Vacuum is just a relatively lower pressure, and pressure tends to go from ...
If the valve is totally effective, then yes, the pressure will remain low. The pressure of a gas is a measure of how much force its particles exert on the container it's in, over a given area. The pump removes many of the particles, so the force they collectively exert goes down; it stays down as long as no new particles enter.
Top 50 recent answers are included