^i learn u learn continued: engines: internal combustion. Not
   going into this one - it's cool - it's what makes the engine
   make the car 'go' - but you probably learned it in school. parts
   involved: intake valves, exhaust valves, valve stems, valve
   springs, "keepers", valve seat, cylinders - it's at the CENTER
   of it all - click here
   http://www.familycar.com/Classroom/Images/engine_running.gif for
   nifty animation. Now, if it's running at 10000 RPM, that means
   the process is happening 10000 times per minute, which is
   astoundingly fast. Can you think of anything that goes 10,000
   times per minute or even 1000 times a minute? i can't.^