I'm building a hovercraft, and I am using an old computer fan to blow air into a plastic garbage bag and fill it up. I need to poke a few holes on the bottom of the garbage bag to let the air out, and I want to have a less friction as possible. What size should the holes be? And how many?
I vaguely remember a physics teacher once telling me that it is impossible to suck water through a straw that is longer than 32 feet because the air preassure is not strong enough to push it that high when you create a vacuum in your mouth. I know the mechanics behind sucking water through a...
Hi All,
I've come across something that surprised me but I'm sure has a logical explanation...
I have a two small ID tubes that have exactly equal impedance to air flow (for the purposes of the discussion the flow is 2ml/min). I connect them in series with one end of the system exposed...
what is the optimum air pressure for sound waves?
is there a graph that i can look at that ranges from 0 bar (or whatever it's measured in) to such high pressure that the air is almost a solid.
what would you measure the flow of sound waves in?
Alright, this might be a dumb question..
my friend and I are in a little debate. I have built two kinds of "potato cannons": one uses the force of a acetelyne gas + oxygen reaction for the energy (single explosion, flings it far). The other uses actual compressed air: I would pump air into a...
The air temperature at an altitude of 10,000 meters is a chilling
-35º C. Cabin temperatures in airplanes flying at this altitude are comfortable because of air conditioners rather than heaters. A.) Find the pressure at 10,000 m and B) Find the temperature of the air before the air...