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  2. Seasonal energy efficiency ratio - Wikipedia

    en.wikipedia.org/wiki/Seasonal_energy_efficiency...

    The SEER rating of a unit is the cooling output during a typical cooling-season divided by the total electric energy input during the same period. The higher the unit's SEER rating the more energy efficient it is. In the U.S., the SEER is the ratio of cooling in British thermal units (BTUs) to the energy consumed in watt-hours.

  3. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    First letter: heater/filament type; Heater ratings for series-string, AC/DC tubes are given in milliamperes; heater ratings for parallel-string tubes are given in volts. A – 4 V heater for 2-cell lead-acid batteries and for AC mains transformers; B – 180 mA DC series heater; C – 200 mA AC/DC series heater

  4. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    3LR12 (4.5-volt), D, C, AA, AAA, AAAA (1.5-volt), A23 (12-volt), PP3 (9-volt), CR2032 (3-volt), and LR44 (1.5-volt) batteries (Matchstick for reference). This is a list of the sizes, shapes, and general characteristics of some common primary and secondary battery types in household, automotive and light industrial use.

  5. Per-unit system - Wikipedia

    en.wikipedia.org/wiki/Per-unit_system

    In the power systems analysis field of electrical engineering, a per-unit system is the expression of system quantities as fractions of a defined base unit quantity. Calculations are simplified because quantities expressed as per-unit do not change when they are referred from one side of a transformer to the other.

  6. Renewable energy - Wikipedia

    en.wikipedia.org/wiki/Renewable_energy

    The results of a recent review of the literature concluded that as greenhouse gas (GHG) emitters begin to be held liable for damages resulting from GHG emissions resulting in climate change, a high value for liability mitigation would provide powerful incentives for deployment of renewable energy technologies.

  7. highline.huffingtonpost.com

    highline.huffingtonpost.com/miracleindustry/...

    KEY BRAND FACTS: Market NRx Market TRx NRx Share (0/0) TRx Share (0/0) Dollar Share (0/0) 1998 11,735 22,928 25.0% 23.7% 31.9% 1999 YTD 9,625

  8. Metabolic equivalent of task - Wikipedia

    en.wikipedia.org/wiki/Metabolic_equivalent_of_task

    The metabolic equivalent of task (MET) is the objective measure of the ratio of the rate at which a person expends energy, relative to the mass of that person, while performing some specific physical activity compared to a reference, currently set by convention at an absolute 3.5 mL of oxygen per kg per minute, which is the energy expended when sitting quietly by a reference individual, chosen ...

  9. United States federal government credit-rating downgrades

    en.wikipedia.org/wiki/United_States_federal...

    The 2011 S&P downgrade was the first time the US federal government was given a rating below AAA. S&P had announced a negative outlook on the AAA rating in April 2011. The downgrade to AA+ occurred four days after the 112th United States Congress voted to raise the debt ceiling of the federal government by means of the Budget Control Act of 2011 on August 2, 2011.

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