battery charger

This weekend I tried to start my car because we had to take it to the body shop to get fixed. The car had been sitting in the garage for over two months so I wasn't sure if the car would run. When I stuck the key in the ignition the car wouldn't start. Not even the car lights would work; the battery was completely dead. Because the battery had been sitting for months without the car being started which recharges the car battery, the battery now had not enough voltage difference to start the car. I needed to recharge to battery so i connected it to a car battery charger. This device uses current from an outlet and uses it to recharge energy to the dead battery. The charger used a 6.4 Amp setting. This means that 6.4 coulombs were being transferred back to the battery per second. After a couple of hours or charging I hooked the battery back up to the car. Now, when i turned the key the battery had a big enough voltage difference and coulombs of energy to start the car.

physics of electric tape

This weekend i was helping my brother install some car stereo things and one of the tools we used is electric tape. When i taped the wires together i now realized why electric tape is used when dealing with electricity. The wire which caries the electric current is a conductor. This means that electrons easily flow throughout the wire and the wire. The plastic that covers the wire is an insulator. This has a very important purpose because it isolates the wire protects any other conductors, including myself, from coming in contact with the wire and also receiving and electric current. Electric tape is made up of a plastic that is very similar to the insulator that covers the wire. The plastic tape holds and added electrons obtained in the same region and prevents them from being transferred to anything else. When connecting two wire together, electric tape is used to cover and exposed wire to make sure that the wire, which is a conductor, does not come in contact with another conductor. This keeps the circuit closed and prevents any chance of a short circuit.