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  2. Argon - Wikipedia

    en.wikipedia.org/wiki/Argon

    Argon is extracted industrially by the fractional distillation of liquid air in a cryogenic air separation unit; a process that separates liquid nitrogen, which boils at 77.3 K, from argon, which boils at 87.3 K, and liquid oxygen, which boils at 90.2 K. About 700,000 tonnes of argon are produced worldwide every year. [25] [35]

  3. Electric water boiler - Wikipedia

    en.wikipedia.org/wiki/Electric_water_boiler

    Japanese Zojirushi brand "Thermo Pot" electric kettle hot water dispenser Wall mounted, unpressurized electric boiler with 5 liters maximum capacity. An electric water boiler, also called a thermo pot or tea urn [1] in British English, is a consumer electronics small appliance used for boiling water [2] [3] and maintaining it at a constant temperature in an enclosed reservoir.

  4. Isotopes of argon - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_argon

    Argon (18 Ar) has 26 known isotopes, from 29 Ar to 54 Ar, of which three are stable (36 Ar, 38 Ar, and 40 Ar). On Earth, 40 Ar makes up 99.6% of natural argon. The longest-lived radioactive isotopes are 39 Ar with a half-life of 268 years, 42 Ar with a half-life of 32.9 years, and 37 Ar with a half-life of 35.04 days.

  5. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    Built-in small storage water reservoir as part of heat exchanger (typically between 2 US gallons (7.6 L; 1.7 imp gal) to 20 gallons) Dual activation: flow sensing and thermostat control; Hybrid water heaters can be gas-fired (natural gas or propane), or be electrically powered using a combination of heat pump and conventional electric heating ...

  6. Argon compounds - Wikipedia

    en.wikipedia.org/wiki/Argon_compounds

    The infrared absorption peak for Cu(CO) 3 + Ar is 2205 cm −1 compared to 2199 cm −1 for Cu(CO) 3 +. For Cu(CO) 4 + Ar the peak is at 2198 cm −1 compared to 2193 for Cu(CO) 4 +. For Cu(CO) 2 + Ar the peak is at 2221 cm −1 compared to 2218.3 for argon free, and for CuCO + Ar the peak is at 2216 cm −1 considerably different to 2240.6 cm ...

  7. Energy factor - Wikipedia

    en.wikipedia.org/wiki/Energy_factor

    The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

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