6.) What are the differences and similarities between dielectrics and magnetic materials? 7.)Why is that a compass needle always points North (or does it?)
I only know 7 :/ It's all down to Pole Magnetism actually. In short because the earth is magnetic and the needle of a compass is also. You can think of the Earth as having a gigantic bar magnet buried inside. In order for the north end of the compass to point toward the North Pole, you have to assume that the buried bar magnet has its south end at the North Pole. If you think of the world this way, then you can see that the normal opposites attract rule of magnets would cause the north end of the compass needle to point toward the south end of the buried bar magnet. So the compass points toward the North Pole
STP is the most widely used product for this. It helped me improve mileage for that tank of gas. It states to clean the engine's internals and make it more efficient, but I am not sure how true that is. I recently changed my dirty air filter and that has help nicely. Also beware of which gas station's gas you choose they make a difference!
