Domain names
To register a domain for your web page,you must choose a name that is not already being used.Domain registration services have search engines for checking possible names.
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Fluorescent tubes
Inside a fluorescent tube, there is a metalic filament, normally made of tungsten. There is also an inert gas, such as argon, and a small amount of mercury. When an electric current passes through the filament, electrons are emited into the inert gas.
Heat
The energy that an electric current produce as heat is called the joule effect. It is expressed by the following formula: E=(IxI)xRxT
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