I have chosen to do my physics report on the internal-combustion engine. I will mention the four-stroke cycle, the components of an engine, the ignition system, the carburetor system and how an engine works. The four-stroke cycle obviously has four strokes, which consists of the intake stroke, the compression stroke, the power stroke and the exhaust stroke. The intake stroke occurs when the air/fuel mixture enters the cylinder through a one way valve which is housed in the cylinder head (the cylinder head also houses the lifters and valve s ....