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  2. Extraterrestrial life - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_life

    Extraterrestrial life, or alien life (colloquially, aliens), is life which does not originate from Earth.No extraterrestrial life has yet been conclusively detected. Such life might range from simple forms such as prokaryotes to intelligent beings, possibly bringing forth civilizations that might be far more advanced than humans.

  3. List of 9-1-1 characters - Wikipedia

    en.wikipedia.org/wiki/List_of_9-1-1_characters

    Sean Kleier as Greg, an armed robber who seduces Josh in order to clone his access card and hold dispatch hostage; Gabrielle Walsh as Ana Flores, Christopher's teacher in Season 3. She dated Eddie in season 4 and 5, until he broke up with her.

  4. Heat exchanger - Wikipedia

    en.wikipedia.org/wiki/Heat_exchanger

    Tubular heat exchanger Partial view into inlet plenum of shell and tube heat exchanger of a refrigerant based chiller for providing air-conditioning to a building. A heat exchanger is a system used to transfer heat between a source and a working fluid. Heat exchangers are used in both cooling and heating processes. [1]

  5. Liquefied natural gas - Wikipedia

    en.wikipedia.org/wiki/Liquefied_natural_gas

    The heating value depends on the source of gas that is used and the process that is used to liquefy the gas. The range of heating value can span ±10 to 15 percent. A typical value of the higher heating value of LNG is approximately 50 MJ/kg or 21,500 BTU/lb. [2] A typical value of the lower heating value of LNG is 45 MJ/kg or 19,350 BTU/lb.

  6. Patio heater - Wikipedia

    en.wikipedia.org/wiki/Patio_heater

    A patio heater, also called a mushroom heater or umbrella heater, is a radiant heating appliance for generating thermal radiation for outdoor use. Types of heater [ edit ]

  7. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    Heat flows spontaneously from a region of higher temperature to a region of lower temperature. Heat does not flow spontaneously from lower temperature to higher, but it can be made to flow in this direction if work is performed. The work required to transfer a given amount of heat is usually much less than the amount of heat; this is the ...

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