There are three! (i think)
Usually two cables total. Such as the SATA Cable and the power cable. As for how many wires are in those cables, it would depends on the connection. Such as IDE have 40 wires. Power cables are usually four pin. It all depends.
8
This depends entirely on the use of the cable. In a full features RS-232 cable there would be 9 cables. But most hardware that uses a serial cable doesn't have the need for all of these wires so the number may vary. regards, tesseract
Wire bundles are cables composed of many wires (or wire pairs) in a rope like bundle. They are usually not enclosed in a protective jacket.
80 pins I believe this is wrong! IDE cables have 40 pins and 80 wires and IDE cables for notebooks have 44 pins
Cooper is made into many things such as pennies and electricity wires
There are three wires supplying power to your home two line wires @ 110 volts each and one nutral.
Wires are made form many differant types of copper and othe metals. Why is this it is because electricity is atracted to metals
Yes, USB cables can be extended using CAT5 networking cables. You don't need to cut the wires and combine them yourself though, as there are many cables and hardware solutions available for purchase now.
Note that "electricity" doesn't flow, only current does, which is one aspect of electricity. And current is the flow of electrons. The current created at power plant travels for many miles over long wires called transmission lines. These transmission lines are held up, away from the ground, by giant wood or metal transmission towers through these it reaches houses.
Essentially yes, this is the reason why many electronic cables are surrounded by a metal mesh. This mesh acts as a Faraday cage and helps prevents the wires inside it from acting as an antenna and picking up unwanted noise.
There are many dangers present when doing electrical work including overhead power cables and electrical wires which are obvious and then there are the less obvious ones like cables underground and loose live wires. It is advisable not to do electrical work if you are not a trained professional.