The answer for this to be accurate would vary widely between about .5 cubic feet to about 10 cubic feet. It depends on whether the enclosure has a port or if it is a bandpass box and such and it depends on the specifications like qas, qts, qms and qes. I think that the most important one is the qms and if I'm not mistaken, the lower the qms is, the smaller the enclosure should be. Also, if the enclosure has a port, it can be smaller. The size and length of the port should be computed also. There are speaker design programs on websites and available for download. I suggest one of them. The web page listed below has links to several speaker design programs and links from that page are included for redundancy.
One foot
at least ten.
Air has a weight of about 14.7 pounds per square inch at sea level.
The 11 inch 64 GB is $999.00. The 11 inch 128 GB MacBook Air is 1,199.00. The 13 inch 128 GB Macbook Air is $1,299.00. The 13 inch 256 GB MacBook Air is $1,599.00.
the answer is one atmosphere
There is really not much you can do about it.
yes earth is much different than space because space has no air or water.
When air is squeezed into a smaller space it is pressurized like in a tire. Typically measured in psi or pounds per square inch above normal atmospheric.
How much a basketball weighs depends on the size of the ball. A regular size 29.5 inch basketball weighs 22 ounces with air and without air.
There have not been any air samples taken from space because there is no air in space. Space is vast and there are always particles (usually hydrogen and helium) floating around. However, there is so few particles relative to the vastness of space, that taking samples of the "air" wouldn't accomplish much.
38 psi
14.7lbs/sq. inch