There is no official number of panels for a football (or soccer). There can be 20 (the familiar black and white one) or 8 or 12 or 14 or pretty much any number. These days the better quality balls tend to have less panels for increased aerodynamics. The panels themselves can be hexagonal, pentagonal, or almost any convex or (as popular today) concave shape.
The recommended psi of a size 3 soccer ball is 8-10 lbs. I am not sure of the weight.
dunno what is it
7.5 PSI.
Circumference: 27 to 28 inches Weight: 14 to 16 ounces Pressure: 8.5 to 15.6 psi
Official FIFA soccer balls must be inflated to 12.5-13.5 pounds per square inch.(PSI).
A psi ball is a ball of psychic energy.
9.0-11.0 psi - [Ref. "Football (ball)" - Wikipedia]
Depends what size your pipe is
Regulation soccer balls require between 8.5 and 15.6 PSI. Most balls will have a recommended pressure printed near the valve.
Because, Usually yOur foot size is based on weight and psi on the sole of your foot
Depends on the size of the tire and the weight of the vehicle. Wide tires on a light vehicle=lower psi Skinny tires on a heavy vehicle=higher psi
To really know for sure you have to check it with a good quality gauge, just like the pros do before a game. The bounce test can be pretty close if you know for certain how high the ball will bounce when dropped from a certain distance and can measure it accurately, anything else is just guesswork.