The general term for piston is cylinder, and a cylinder might be made to work in this application. But a cylinder used in this manner, that is, a cylindrical shape connected in a machine that is used in the same way will almost certainly be called a piston by most investigators.
No, the force required to lift an object is not directly proportional to the area of the piston. If the area of piston 1 is half the area of piston 2, it would not require half the force to lift an object. Force is dependent on pressure, which is equal to force divided by area.
Remove engine, disassemble, replace piston, re-assemble engine and install. Good times!
It is just about the hardest most difficult part of an engine to replace. The engine has to come out. The head has to be taken off. The rod of the piston has to be disconnected from the crankshaft. the top of the cylinder has to have a ridge reamer operated on it to get the piston out.
diameter
Which piston? what's wrong. If it's a piston in the engine, you'll need a major rebuild. If it's a master cylinder or wheel cylinder piston, just replace the cylinder, it's not worth the trouble.
How much does a car cost?
you bring it to a shop
If you are mechanically inclined it is cheaper to replace the entire engine
The Nitro piston is superior to the spring piston in design, but Yes, it can be converted back to a spring in most cases. It is best to have it done by an "air gun smith."
take off the bolts at the top of the piston head
The best thing you can do is replace the caliper.
You don't. The only solution to damaged piston rings is to take the engine block out of the car and replace the rings.