9. shot (n.) a consecutive series of pictures that constitutes a unit of action in a film
The vacuum level is determined by the pressure differential between the evacuated volume and the surrounding atmosphere. Several units of measure can be used. Most refer to the height of a column of mercury â usually inches of mercury (in.-Hg) or millimeters of mercury (mm-Hg).
To really create a vacuum, you would need a vacuum pump to pump out all the gases in the container. ------------ (I am yet another contributor) Let me address each piece of information in here. First, to the original question, there are a number of different ways to create a vacuum.