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  2. Gravity (alcoholic beverage) - Wikipedia

    en.wikipedia.org/wiki/Gravity_(alcoholic_beverage)

    The ratio depends on the temperature and pressure of both the sample and water. The pressure is always considered (in brewing) to be 1 standard atmosphere (1,013.25 hPa) and the temperature is usually 20 °C (68 °F) for both sample and water but in some parts of the world different temperatures may be used and there are hydrometers sold ...

  3. Cross ventilation - Wikipedia

    en.wikipedia.org/wiki/Cross_ventilation

    Cross-breezes work when two windows are opposite of each other. Cross ventilation is a natural phenomenon where wind, fresh air or a breeze enters upon an opening, such as a window, and flows directly through the space and exits through an opening on the opposite side of the building (where the air pressure is lower).

  4. Coffee percolator - Wikipedia

    en.wikipedia.org/wiki/Coffee_percolator

    Siphon brewing relies on vapor pressure to raise water from a pressure chamber up to the brewing chamber where the coffee is infused. Once the heat source has been removed from the pressure chamber, the atmosphere within cools, lowering the pressure and drawing the coffee through a filter and back into the pressure chamber.

  5. Coffeemaker - Wikipedia

    en.wikipedia.org/wiki/Coffeemaker

    A stove-top, Italian style coffee maker A 2016-model electric coffeemaker. A coffeemaker, coffee maker or coffee machine is a cooking appliance used to brew coffee.While there are many different types of coffeemakers, the two most common brewing principles use gravity or pressure to move hot water through coffee grounds.

  6. Thermosiphon - Wikipedia

    en.wikipedia.org/wiki/Thermosiphon

    Thermosyphon circulation in a simple solar water heater (not a working model; there is no water supply to replenish the tank when the tap is used). A thermosiphon (or thermosyphon) is a device that employs a method of passive heat exchange based on natural convection, which circulates a fluid without the necessity of a mechanical pump.

  7. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Domestically, water is traditionally heated in vessels known as water heaters, kettles, cauldrons, pots, or coppers. These metal vessels that heat a batch of water do not produce a continual supply of heated water at a preset temperature. Rarely, hot water occurs naturally, usually from natural hot springs. The temperature varies with the ...

  8. Thermal pressure - Wikipedia

    en.wikipedia.org/wiki/Thermal_Pressure

    Figure 1: Thermal pressure as a function of temperature normalized to A of the few compounds commonly used in the study of Geophysics. [3]The thermal pressure coefficient can be considered as a fundamental property; it is closely related to various properties such as internal pressure, sonic velocity, the entropy of melting, isothermal compressibility, isobaric expansibility, phase transition ...

  9. Hydraulic analogy - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_analogy

    In general, electric potential is equivalent to hydraulic head. This model assumes that the water is flowing horizontally, so that the force of gravity can be ignored. In this case, electric potential is equivalent to pressure. The voltage (or voltage drop or potential difference) is a difference in pressure between two points.

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