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  2. Vehicle audio - Wikipedia

    en.wikipedia.org/wiki/Vehicle_audio

    Amplifiers increase the power level of audio signals. Some head units have built-in stereo amplifiers. Other car audio systems use a separate stand-alone amplifier. Every amplifier has a rated power level sometimes noted on the head unit with the built-in amplifier, or on the label of a stand-alone unit.

  3. Static electricity - Wikipedia

    en.wikipedia.org/wiki/Static_electricity

    Electromagnetism. Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it can move away by an electric current or electrical discharge. The word "static" is used to differentiate it from current electricity, where an electric charge flows through an electrical conductor.

  4. Charge conservation - Wikipedia

    en.wikipedia.org/wiki/Charge_conservation

    In physics, charge conservation is the principle that the total electric charge in an isolated system never changes. [ 1] The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved. Charge conservation, considered as a physical conservation law, implies that the ...

  5. Electric charge - Wikipedia

    en.wikipedia.org/wiki/Electric_charge

    Electric charge is a conserved property: the net charge of an isolated system, the quantity of positive charge minus the amount of negative charge, cannot change. Electric charge is carried by subatomic particles. In ordinary matter, negative charge is carried by electrons, and positive charge is carried by the protons in the nuclei of atoms.

  6. Cold cathode - Wikipedia

    en.wikipedia.org/wiki/Cold_cathode

    A set of cold cathode discharge tubes. A cold cathode [1] is a cathode that is not electrically heated by a filament. [note 1] A cathode may be considered "cold" if it emits more electrons than can be supplied by thermionic emission alone. It is used in gas-discharge lamps, such as neon lamps, discharge tubes, and some types of vacuum tube.

  7. Here's why car payments are so high right now - AOL

    www.aol.com/news/heres-why-car-payments-high...

    Car payments have skyrocketed in recent years due to a combination of high prices and high interest rates. While some relief may come soon, industry insiders say prices may still remain high for ...

  8. Elementary charge - Wikipedia

    en.wikipedia.org/wiki/Elementary_charge

    The elementary charge, usually denoted by e, is a fundamental physical constant, defined as the electric charge carried by a single proton or, equivalently, the magnitude of the negative electric charge carried by a single electron, which has charge −1 e. [ 2][ a] In the SI system of units, the value of the elementary charge is exactly ...

  9. Phone connector (audio) - Wikipedia

    en.wikipedia.org/wiki/Phone_connector_(audio)

    Phone connector (audio) Phone plug mated in a phone socket. The plug's grooved tip is held firmly by the socket's spring tip contact. When not mated, this spring instead connects to the flat switch contact for detecting a plug. A phone connector is a family of cylindrically -shaped electrical connectors primarily for analog audio signals.