Yes, the starter for one, and really any electrical motor in the car.
A car is required to have spark-plugs in order to run. It's part of the ignition, and basically a needed element for the engine to run.
Soap and water
Certainly. Once the engine is running the starter is not needed.
An electromagnet is only magnetic when an electric current is run through it.
A 486 or compatible.
An elecromagnet is the entire set of coils which produce a magnetic field when an electrical current is run through the wire. A solenoid is a single coil in the electromagnet.
IT is different because an electromagnet runs with electricity. A refrigiator does not run with electricity.
Yes, a car needs a radiator to run because it stores the coolant for the engine and dispenses it when needed. So, if it didn't have one the car would overheat and not be able to move :)
yes. In order for the engine to run, it needs both O2 and gas. If it doesnt get one or the other, it wont run
Pre-computer operated vehicles could run cooler if needed.
hydrogen has three times the potential energy of gas, but it has four times the volume. It would take less hydrogen by weight but it would take more by volume to run a car
You run more copperwire around the coil, or induce more curent in the wire.