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  2. Box-spring - Wikipedia

    en.wikipedia.org/wiki/Box-spring

    Box-spring Queen size box-spring on metal bed frame 8-way hand-tied box spring. A box-spring (or divan in some countries) is a type of bed base typically consisting of a sturdy wooden frame covered in cloth and containing springs. Usually, the box-spring is placed on top of a wooden or metal bedframe that sits on the floor and acts as a brace ...

  3. Joule - Wikipedia

    en.wikipedia.org/wiki/Joule

    One square metre of the Earth receives about 1.4 kilojoules of solar radiation every second in full daylight. [20] A human in a sprint has approximately 3 kJ of kinetic energy, [21] while a cheetah in a 122 km/h (76 mph) sprint has approximately 20 kJ. [22] One watt-hour, of electricity or any other form of energy, is 3.6 kJ. megajoule

  4. TNT equivalent - Wikipedia

    en.wikipedia.org/wiki/TNT_equivalent

    The complete conversion of 1 kg of matter into pure energy would yield the theoretical maximum (E = mc 2) of 89.8 petajoules, which is equivalent to 21.5 megatons of TNT. No such method of total conversion as combining 500 grams of matter with 500 grams of antimatter has yet been achieved.

  5. List of SI electromagnetism units - Wikipedia

    en.wikipedia.org/wiki/List_of_SI...

    Symbol [1] Name of quantity Unit name Symbol Base units E energy: joule: J = C⋅V = W⋅s kg⋅m 2 ⋅s −2: Q electric charge: coulomb: C A⋅s I electric current: ampere

  6. Voltage converter - Wikipedia

    en.wikipedia.org/wiki/Voltage_converter

    A voltage converter is an electric power converter which changes the voltage of an electrical power source.

  7. HVDC converter station - Wikipedia

    en.wikipedia.org/wiki/HVDC_converter_station

    An HVDC converter station (or simply converter station) is a specialised type of substation which forms the terminal equipment for a high-voltage direct current (HVDC) transmission line. [1] It converts direct current to alternating current or the reverse.

  8. Maxwell model - Wikipedia

    en.wikipedia.org/wiki/Maxwell_material

    Diagram of a Maxwell material. The Maxwell model is represented by a purely viscous damper and a purely elastic spring connected in series, [5] as shown in the diagram. If, instead, we connect these two elements in parallel, [5] we get the generalized model of a solid Kelvin–Voigt material.

  9. Marx generator - Wikipedia

    en.wikipedia.org/wiki/Marx_generator

    Marx generator diagrams; Although the left capacitor has the greatest charge rate, the generator is typically allowed to charge for a long period of time, and all capacitors eventually reach the same charge voltage. The circuit generates a high-voltage pulse by charging a number of capacitors in parallel, then suddenly connecting them in series ...