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  2. Ton of refrigeration - Wikipedia

    en.wikipedia.org/wiki/Ton_of_refrigeration

    It was originally defined as the rate of heat transfer that results in the freezing or melting of 1 short ton (2,000 lb; 907 kg) of pure ice at 0 °C (32 °F) in 24 hours. [1] [2] The modern definition is exactly 12,000 Btu IT /h (3.516853 kW). Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in "tons" (of ...

  3. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. [1] [2] [3]

  4. List of airports in Sri Lanka - Wikipedia

    en.wikipedia.org/wiki/List_of_airports_in_Sri_Lanka

    Aeronautical Information Services of Sri Lanka. Archived from the original on 2016-01-24 "Aerodrome Index Chart" (PDF). Aeronautical Information Services of Sri Lanka. Archived from the original (PDF) on 2016-01-24 "Location Indicators by State" (PDF).

  5. Economy of Sri Lanka - Wikipedia

    en.wikipedia.org/wiki/Economy_of_Sri_Lanka

    Services accounted for 58.2% of Sri Lanka's economy in 2019 up from 54.6% in 2010, industry 27.4% up from 26.4% a decade earlier and agriculture 7.4%. [41] Though there is a competitive export agricultural sector, technological advances have been slow to enter the protected domestic sector. [42]

  6. 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 ...

  7. Sri Lankan units of measurement - Wikipedia

    en.wikipedia.org/wiki/Sri_Lankan_units_of...

    A number of different units of measurement were used in Sri Lanka to measure quantities like length, mass and capacity from very ancient times. [1] Under the British Empire, imperial units became the official units of measurement [2] and remained so until Sri Lanka adopted the metric system in the 1970s. [3] [4]

  8. Mains electricity by country - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity_by_country

    Sri Lanka: D, G, M SLS 734 230 V 400 V 50 Hz Only type G permitted to be manufactured or imported from August 2017. [63] Sudan: C, D, F, G 230 V 400 V 50 Hz Suriname: A, B, C, F 127 V 220 V 400 V 60 Hz Type A and B tend to be very common because standard sockets can't accommodate such voltage. Sweden: C F IEC 60309 SS-EN 50075

  9. Exchange rate - Wikipedia

    en.wikipedia.org/wiki/Exchange_rate

    The spot exchange rate is the current exchange rate, while the forward exchange rate is an exchange rate that is quoted and traded today but for delivery and payment on a specific future date. In the retail currency exchange market, different buying and selling rates will be quoted by money dealers.