Here's one of the questions he posted on other forums that was worked out for him.
Here is a example,,, Two hundred cubic feet of air at 14.7 psia is compressed to 90 psig. What volume of receiver is required? Another,,, A cylinder has a 3.0 inch bore and a 0.75 inch diameter rod extending from both sides of the piston, if the cylinder is pressurized by 100 psig air so that the rod is extended what force is developed by the cylinder?
Anyhow, he got the answers to his homework but he just don't seem to get the basics.
Either that or he is just getting a kick out of posting these same math questions on every forum under the sun.
It's starting to become spam to me when I see it on all the different forums I visit.