Most likely your alternator.
there really is no difference in the engine it will be the computer and electrical connections
If you mean why the difference in RPMs between idling and driving, the difference is due to the engine load; At idle, the engine isn't really doing much other than staying running, but under load (driving) the engine has to put its power out to the drivetrain, hence the symptomatic loss of engine speed (RPMs).
It's most likely air entering the air system and becoming really hot as it passes the now hotter than usual engine and the air continues the the lower pressured cabin and onto your sweaty legs
The electrical system is 12 volt negative ground. Really about 13.6 volts while the engine is running, though.
no. unless you are really, really, really,(continues for 5 pages), really lucky
the starter is on the front of the transmission and it only has two bolts holding it and then there is an electrical wire that plugs in it. It is really easy!!! Good luck!!! the starter is on the front of the transmission and it only has two bolts holding it and then there is an electrical wire that plugs in it. It is really easy!!! Good luck!!!
If you are completely oblivious, yes, but if so really you shouldn't be driving anyway.
It can cause the head gaskets to blow. This must be repaired before driving again. If really overheated, you can blow your engine. This would need replacing.
If speed indicator works probably a bad gear in the speedometer head
Nerve cells. They are really more chemical than electrical, however.
schematic
Your hood will get hot after driving because of the heat from the engine. To keep the hood cooler you can insulate the underside with fiberglass batting. You can get such at your local parts store. They make aluminized batting that, by reflecting the heat, will be even more effective.