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  2. Orders of magnitude (power) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(power)

    tech: electric power output of 1 m 2 solar panel in full sunlight (approx. 12% efficiency), at sea level 1.3 × 10 2: tech: peak power consumption of a Pentium 4 CPU 2 × 10 2: tech: stationary bicycle average power output [17] [18] 2.76 × 10 2: astro: fusion power output of 1 cubic meter of volume of the Sun's core. [19] 2.9 × 10 2: units ...

  3. Watt - Wikipedia

    en.wikipedia.org/wiki/Watt

    The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m 2 ⋅s −3. [ 1 ] [ 2 ] [ 3 ] It is used to quantify the rate of energy transfer .

  4. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    The factor–label method can convert only unit quantities for which the units are in a linear relationship intersecting at 0 (ratio scale in Stevens's typology). Most conversions fit this paradigm. An example for which it cannot be used is the conversion between the Celsius scale and the Kelvin scale (or the Fahrenheit scale). Between degrees ...

  5. Decibel - Wikipedia

    en.wikipedia.org/wiki/Decibel

    The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...

  6. Subwoofer - Wikipedia

    en.wikipedia.org/wiki/Subwoofer

    While in the 1960s and 1970s deep bass speakers were once an exotic commodity owned by audiophiles, by the mid-1990s they were much more popular and widely used, with different sizes and capabilities of sound output. [33] An example of 1990s subwoofer use in sound reinforcement is the Ministry of Sound dance club which opened in 1991 in London ...

  7. Ampeg - Wikipedia

    en.wikipedia.org/wiki/Ampeg

    Baby Bass, introduced around 1962, was an electric upright bass with a full-size wooden neck and a cello-sized Uvex plastic body. The design was purchased from Zorko, re-engineered by Jess Oliver, and manufactured in a corner of Ampeg's Linden, New Jersey factory.

  8. Kill A Watt - Wikipedia

    en.wikipedia.org/wiki/Kill_A_Watt

    The Kill A Watt (a pun on kilowatt) is an electricity usage monitor manufactured by Prodigit Electronics and sold by P3 International. It measures the energy used by devices plugged directly into the meter, as opposed to in-home energy use displays , which display the energy used by an entire household.

  9. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The barn (b) is a unit of area used in nuclear physics equal to one hundred femtometres squared (100 fm 2 = 10 −28 m 2). The are (a) is a unit of area equal to 100 m 2. The decare (daa) is a unit of area equal to 1000 m 2. The hectare (ha) is a unit of area equal to 10 000 m 2 (0.01 km 2).