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  2. Giga- - Wikipedia

    en.wikipedia.org/wiki/Giga-

    In English, the prefix giga can be pronounced / ˈ ɡ ɪ ɡ ə / (a hard g as in giggle), or / ˈ dʒ ɪ ɡ ə / (a soft g as in gigantic, which shares giga 's Ancient Greek root). [5] A prominent example of this latter pronunciation is found in the pronunciation of gigawatts in the 1985 film Back to the Future.

  3. Historical definitions of the SI base units - Wikipedia

    en.wikipedia.org/wiki/Historical_definitions_of...

    17th CGPM (1983, Resolution 1, CR, 97) 1 / 10 000 000 of the distance from the Earth's equator to the North Pole measured on the circumference through Paris. L kilogram: kg mass "The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram." 3rd CGPM (1901, CR, 70)

  4. List of obsolete units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_obsolete_units_of...

    Large sack – a unit of mass equal to 2 (new) sacks; Long ton; Lot; Mark; Munjandie; Oka; Pao; Passeree – a unit of mass equal to about 4.6 kg (10.1412640605 lb) Pennyweight; Pood; Roll – a U.K. unit of mass for butter and cheese [7]: 46 equal to 24 oz (680 g) [7]: 52 Room – a U.K. unit of mass of coal equivalent to 15,680 lb (7,110 kg ...

  5. Watt - Wikipedia

    en.wikipedia.org/wiki/Watt

    1 terawatt hour per year = 1 × 10 12 W·h / (365 days × 24 hours per day) ≈ 114 million watts, equivalent to approximately 114 megawatts of constant power output. The watt-second is a unit of energy, equal to the joule. One kilowatt hour is 3,600,000 watt seconds.

  6. 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 ...

  7. Units of energy - Wikipedia

    en.wikipedia.org/wiki/Units_of_energy

    Natural gas is often sold in units of energy content or by volume. Common units for selling by energy content are joules or therms. One therm is equal to about 1,055 megajoules. Common units for selling by volume are cubic metre or cubic feet. Natural gas in the US is sold in therms or 100 cubic feet (100 ft 3). In Australia, natural gas is ...

  8. List of international units - Wikipedia

    en.wikipedia.org/wiki/List_of_international_units

    In SI base units In other SI units SI: Physics: Basic: second [n 1] s: T: time: The duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom. s: SI: Physics: Basic: metre: m: L: length: The distance travelled by light in vacuum in ⁠ 1 / 299 ...

  9. List of physical quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_quantities

    Heat capacity per unit mass J/(K⋅kg) L 2 T −2 Θ −1: intensive Specific volume: v: Volume per unit mass (reciprocal of density) m 3 ⋅kg −1: L 3 M −1: intensive Spin: S: Quantum-mechanically defined angular momentum of a particle kg⋅m 2 ⋅s −1: L 2 M T −1: Strain: ε: Extension per unit length unitless 1: Stress: σ: Force per ...