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Air pressure
The force put on a given area by the weight of the air above it is called atmospheric pressure.
No. Not at all. Volume has no force. Put 1 cubic foot of air inside a sealed jar, and weigh the air. Now let the same air into a 10-cubic-foot jar; seal the jar, and weigh the air again. The air has 10 times the original volume, but it still has exactly the same weight.
Downforce
Yes, the mass of the balloon increases as you put in more air because air has mass. The more air you add to the balloon, the more mass it will have.
That's the "mechanical advantage" of the machine.
Atmospheric pressure
The United States Air Force put them in a secret localtion and they will not tell me where.
execution
When the attacks first happened, President Bush was in an Elementary school in Florida. As soon as they got the word he was put onto air force one and was in there until they thought it was safe
The atmospheric pressure at that place and at that time.
Resistance from air.