Relation between the internet and magnetism? Please Help?

Question

I'm doing a physics homework about magnetism and I need to know how the Internet relates to it, maybe it has to do with electromagnetic waves or something, someone please help

Answer 1

Wow! That's a vague question.

The Internet being a network of computers, linked together by telecommunications equipment makes use of magnetism in a number of ways. Also, magnetism results from any flow of electrons through a conductor, and since the Internet is responsible for a very large number of electrons flowing through a large number of conductors, it's also responsible for a cumulatively large amount of magnetic radiation.

The Internet makes use of radio waves as it moves it's massive quantities of data around. It does so through microwave links maintained by backbone carriers, such as Sprint. These links consist of microwave tranceivers, point to point, on the ground and ground to satellite. Wireless ISPs use coded digital microwaves to tranceive your end-user service from your computer to and from the cellsite or wi-fi hub.

Radio waves are merely expanding, concentric, magnetic fields of alternating polarity propagating away from the transmission antenna at the speed of light. Signals, representing data are encoded into the fields using a number of different methods, which will give us both a headache if I try to explain them.

The Internet, as observed above, consists of networked computers. These computers rely on magnetic storage technology to store the massive quantities of data that the computer needs to function and which is hosted by Internet servers. Mostly, the magnetic storage consists of hard drives which use electromagnetic fields to align iron oxide particles suspended in a coating applied to an aluminum disk. The aligned particles exhibit a magnetic field. These tiny magnetic fields are interpreted either as "1"s or "0"s, depending on the the specific storage system. In some systems, the charged areas are "1"s, and the noncharged areas are "0"s. In other systems, this is reversed. Data is read back by passing a magnetic coil over the surface of the disk. The charged areas induce a slight current in the coil, which is interpreted as a bit. The noncharged areas don't induce a current. This is interpreted as a bit of the opposite value. Put all the billions of charged and noncharged areas together, and you have data. Of course, the disk has to be spun, which necesitates the use of an electric motor, which uses electromagnets to convert electricity into motion. The read/write heads have to move across the surface of the disk. This is usually done with an electromagnetic "voice coil" actuator, or a precisely controlled solenoid.

If you're viewing the Internet with an old CRT-type monitor, magnetism is relating to the Internet in another way. Tube-based monitors use electron streams to excite the phosphorus paint behind the glass of your screen. Pulsed electromagnetic fields created by steering magnets in the neck of the CRT tube direct the scanning electron beam in precisely the right places on the screen matrix to create the image that is your web browser, or IRC client or USENET feed, or whatever.

If you like to listen to downloaded music or if your streaming videos have audio of any kind, the Internet is driving loudspeakers for you. A loudspeaker is any type of device that transduces (converts) modulated current into audible sound. The sound is transferred to your computer as digital data. A program known as a DAC or digital/analog converter converts the data to an electrical waveform, modulated like sound. The waveform is amplified and sent to your loudspeakers which have wire coils, also known as voice coils. When the modulated current passes through the coils, it produces a magnetic field, modulated in the same way as the current. The coil rests below a flexible cone made of paper or a pliable synthetic material capable of bellowing in and out. At the center of the cone is a permanent magnet. The magnet responds to the modulated field produced by the coil by vibrating, causing the cone to "pump" air, in a pattern that your ears can pick up as sound. Note that the current driving the voice coil must not alternate direction (A/C) or the voice coil will not be able to change state fast enough to generate sound. Also, amplified alternating current at frequencies over about 1 KHz will propagate as radio waves.

Finally, none of what I've described above would work without grid current. That's the electricity that powers stuff that you plug into a wall socket. Most of the current, other then solar generated power, comes from dynamos in electrical generating stations. A dynamo (compound electrical generator) converts physical motion into electricity. The physical energy can be provided by moving water, wind, geothermal steam run through a turbine, or by engines driven by coal, oil or other fuels. All of them just turn shafts that spin magnetic fields in the presence of wire coils. The action of the moving magnetic fields "cutting" through the coils generates electrical current. The millions of interlinked machines that make up the Internet would not function without grid power, and grid power would mostly not exist without magnetism.

I'm sure there are gadzillions of other ways that magnetism relates to the Internet, and any one of the simple examples I've given can be expanded tremendously. In fact, any one of these examples can be pursued as an engineering career.

Hope this helps.

Answer 2

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Answer 3

i would think that its because it draws you into it,several hours at a time.just wondering hopelessly on the internet wasting time!
or it could be how it has us drew in ,think about it,what do you do when you are bored?you get on the internet.where do you go to look up something or to find something out about something,ect.THE INTERNET!