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  2. Walmart - Wikipedia

    en.wikipedia.org/wiki/Walmart

    Walmart Inc. /  36.36556°N 94.21750°W  / 36.36556; -94.21750. Walmart Inc. ( / ˈwɔːlmɑːrt / ⓘ; formerly Wal-Mart Stores, Inc.) is an American multinational retail corporation that operates a chain of hypermarkets (also called supercenters), discount department stores, and grocery stores in the United States, headquartered in ...

  3. Thermoelectric generator - Wikipedia

    en.wikipedia.org/wiki/Thermoelectric_generator

    A thermoelectric generator ( TEG ), also called a Seebeck generator, is a solid state device that converts heat (driven by temperature differences) directly into electrical energy through a phenomenon called the Seebeck effect [1] (a form of thermoelectric effect ). Thermoelectric generators function like heat engines, but are less bulky and ...

  4. Cutoff frequency - Wikipedia

    en.wikipedia.org/wiki/Cutoff_frequency

    Where s is the s-plane variable, ω is angular frequency and j is the imaginary unit.. Chebyshev filters. Sometimes other ratios are more convenient than the 3 dB point. For instance, in the case of the Chebyshev filter it is usual to define the cutoff frequency as the point after the last peak in the frequency response at which the level has fallen to the design value of the passband ripple.

  5. Caffeine - Wikipedia

    en.wikipedia.org/wiki/Caffeine

    Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. [9] It is mainly used as a eugeroic ( wakefulness promoter) or as a mild cognitive enhancer to increase alertness and attentional performance. [10] [11] Caffeine acts by blocking binding of adenosine to the adenosine A 1 receptor, which enhances release of the ...

  6. Atmospheric water generator - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_water_generator

    An atmospheric water generator (AWG), is a device that extracts water from humid ambient air, producing potable water. Water vapor in the air can be extracted either by condensation - cooling the air below its dew point , exposing the air to desiccants , using membranes that only pass water vapor, collecting fog, [1] or pressurizing the air.

  7. Louisiana - Wikipedia

    en.wikipedia.org/wiki/Louisiana

    Louisiana entrance sign off Interstate 20 in Madison Parish east of Tallulah. Louisiana [pronunciation 1] (French: Louisiane ⓘ; Spanish: Luisiana; Louisiana Creole: Lwizyàn) is a state in the Deep South and South Central regions of the United States.

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