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in China is rated at approximately 22 gigawatts). This reflects the maximum power output it can achieve at any point in time. A power station's annual energy output, however, would be recorded using units of energy (not power), typically gigawatt hours. Major energy production or consumption is often
1349:
1879:
of power being used (or generated). For example, a power plant that changes its power output from 100 MW to 200 MW in 15 minutes would have a ramp-up rate of 400 MW/h. Gigawatts per hour are used to characterize the ramp-up required of the
709:
watt was redefined from practical units to absolute units (i.e., using only length, mass, and time). Concretely, this meant that 1 watt was defined as the quantity of energy transferred in a unit of time, namely 1 J/s. In this new definition, 1
2905:
1374:. For example, by the end of 2010, power shortages in China's Shanxi province were expected to increase to 5–6 GW and the installation capacity of wind power in Germany was 25.8 GW. The largest unit (out of four) of the Belgian
411:
1865:
Average household electric power consumption is 1.19 kW in the US, 0.53 kW in the UK. In India it is 0.13 kW (urban) and 0.03 kW (rural) – computed from GJ figures quoted by
Nakagami, Murakoshi and
1692:
for a given period; often a calendar year or financial year. One terawatt hour of energy is equal to a sustained power delivery of one terawatt for one hour, or approximately 114 megawatts for a period of one year:
1348:
587:
1444:. Based on the average total solar irradiance of 1.361 kW/m, the total power of sunlight striking Earth's atmosphere is estimated at 174 PW. The planet's average rate of global warming, measured as
2825:
2903:
698:
1267:
Many events or machines produce or sustain the conversion of energy on this scale, including large electric motors; large warships such as aircraft carriers, cruisers, and submarines; large
2904:
492:
1398:
itself emits 47±2 TW, far less than the energy received from solar radiation. The most powerful lasers from the mid-1960s to the mid-1990s produced power in terawatts, but only for
1370:
A gigawatt is typical average power for an industrial city of one million habitants and also the output of a large power station. The GW unit is thus used for large power plants and
1647:
are closely related but distinct physical quantities. Power is the rate at which energy is generated or consumed and hence is measured in units (e.g. watts) that represent energy
1279:, and the output pulses of very large lasers. A large residential or commercial building may use several megawatts in electric power and heat. On railways, modern high-powered
722:
watt, which implies caution when comparing numerical values from this period with the post-1948 watt. In 1960, the 11th
General Conference on Weights and Measures adopted the
285:
2570:
1537:, which maintains the SI-standard, states that further information about a quantity should not be attached to the unit symbol but instead to the quantity symbol (e.g.,
1255:
of a household in the United States is about 1 kilowatt. A surface area of 1 square meter on Earth receives typically about one kilowatt of sunlight from the Sun (the
645:
A laborer over the course of an eight-hour day can sustain an average output of about 75 watts; higher power levels can be achieved for short intervals and by athletes.
611:
2837:
674:
might be an appropriate name for a unit of power. Siemens defined the unit within the existing system of practical units as "the power conveyed by a current of an
2084:
Siemens supported his proposal by asserting that Watt was the first who "had a clear physical conception of power, and gave a rational method for measuring it".
1115:
referenced to 1 femtowatt). This is 0.2739 microvolts across a 75-ohm load or 0.5477 microvolt across a 300-ohm load; the specification takes into account the RF
2329:
630:
A person having a mass of 100 kg who climbs a 3-meter-high ladder in 5 seconds is doing work at a rate of about 600 watts. Mass times acceleration due to
507:
1394:
used by humans worldwide was about 160,000 terawatt-hours in 2019, corresponding to an average continuous power consumption of 18 TW that year.
2196:
Ainslie, M. A. (2015). A century of sonar: Planetary oceanography, underwater noise monitoring, and the terminology of underwater sound. Acoustics Today.
663:
1436:, giving a total energy of 600 J. Another example is the Laser for Fast Ignition Experiments (LFEX) at the Institute of Laser Engineering (ILE),
2243:
2920:
2614:
2283:
1728:
While a watt per hour is a unit of rate of change of power with time, it is not correct to refer to a watt (or watt-hour) as a watt per hour.
2801:
2764:
2591:
2406:
1988:
2778:
1965:
1534:
3299:
2709:
2336:
2156:
2428:
Davidson, CC; Preedy, RM; Cao, J; Zhou, C; Fu, J (October 2010), "Ultra-High-Power
Thyristor Valves for HVDC in Developing Countries",
702:
1445:
2863:
2433:
2223:
2564:
2366:
446:
1421:
1167:(ECG), in a wide variety of scientific and engineering instruments and also in reference to radio and radar receivers. Compact
1420:
A petawatt can be produced by the current generation of lasers for time scales on the order of picoseconds. One such laser is
2021:
2713:
2282:: American Council for an Energy-Efficient Economy. Figure 3. Energy Consumption per Household by Fuel Type. 8:214–8:224.
3015:
2340:
1357:
2795:
2122:
2051:
1982:
1949:
2542:
2392:
2171:
1456:
The power output of the Sun is 382.8 YW, about 2 billion times the power estimated to reach Earth's atmosphere.
3205:
1767:
1807:
1395:
3309:
2316:
60:
3024:
2455:
1914:
727:
208:
1787:
1506:
1429:
739:
2965:
1940:
Yildiz, I.; Liu, Y. (2018). "Energy units, conversions, and dimensional analysis". In Dincer, I. (ed.).
1375:
1296:
1252:
2636:
Loeb, Norman G.; Johnson, Gregory C.; Thorsen, Tyler J.; Lyman, John M.; et al. (June 15, 2021).
1677:. This same amount of energy would light a 40-watt bulb for 2.5 hours, or a 50-watt bulb for 2 hours.
681:
In
October 1908, at the International Conference on Electric Units and Standards in London, so-called
3353:
2939:
2279:
2239:
1313:
1236:
177:
38:
17:
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definitions were established for practical electrical units. Siemens' definition was adopted as the
3263:
2606:
2266:
1617:
1604:
1172:
220:
2782:
2756:
2585:
2414:
2085:
2067:
1969:
1570:
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3304:
1566:
1466:
1416:
1322:
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2146:
1402:
intervals. The average lightning strike peaks at 1 TW, but these strikes only last for 30
1147:
Powers measured in nanowatts are also typically used in reference to radio and radar receivers.
1111:
energy applied to the antenna input be specified. These input levels are often stated in dBf (
2953:
2741:
2534:
1160:
618:
596:
255:
31:
2072:
Report of the Fifty-Second meeting of the
British Association for the Advancement of Science
2984:
2935:
2649:
2607:"Construction of a Composite Total Solar Irradiance (TSI) Time Series from 1978 to present"
2494:
2215:
2160:. Vol. 27 (11th ed.). Cambridge University Press. pp. 738–745, see page 742.
2141:
1856:
gives 2940 J. Dividing this by the time taken (5 s) gives a power of 588 W.
1592:
1213:
1127:
Powers measured in picowatts are typically used in reference to radio and radar receivers,
659:
634:
times height divided by the time it takes to lift the object to the given height gives the
428:
2859:
2238:
Stetzler, Trudy; Magotra, Neeraj; Gelabert, Pedro; Kasthuri, Preethi; Bangalore, Sridevi.
8:
3348:
3289:
1792:
1577:
1304:
1280:
1220:
1176:
239:
2653:
2498:
1558:
406:{\displaystyle \mathrm {1~W=1~J{/}s=1~N{\cdot }m{/}s=1~kg{\cdot }m^{2}{\cdot }s^{-3}} .}
1759:
1588:
1164:
1156:
2370:
1884:
on an electric grid to compensate for loss of output from other sources, such as when
3327:
3213:
3001:
2791:
2512:
2312:
2118:
2047:
2017:
1978:
1945:
1621:
1337:
738:
For additional examples of magnitude for multiples and submultiples of the watt, see
251:
2240:"Low-Power Real-Time Programmable DSP Development Platform for Digital Hearing Aids"
1440:, which achieved a power output of 2 PW for a duration of approximately 1
1272:
2657:
2502:
1921:
1684:
1683:
are rated using units of power, typically megawatts or gigawatts (for example, the
1437:
1256:
1075:
The sound intensity in water corresponding to the international standard reference
416:
271:
1557:) and so these unit symbols are non-SI. In compliance with SI, the energy company
3080:
2097:
1640:
1510:
1248:
1132:
1116:
1104:
614:
497:
420:
247:
232:
200:
75:
1517:(i.e. heat), which creates steam to drive a turbine, which generates 648 MW
3233:
3165:
2736:
2705:
2482:
2447:
1802:
1781:
1773:
1624:
1609:
1482:
1391:
1379:
1232:
1076:
279:
224:
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The
International System of Units: Its History and Use in Science and Industry
662:
in August 1882 in his
President's Address to the Fifty-Second Congress of the
3342:
3294:
3218:
3155:
3145:
2516:
2151:
1925:
1745:
1689:
1680:
1561:
uses the unit megawatt for produced electrical power and the equivalent unit
1502:
1288:
1276:
1235:, tools, machines, and heaters. It is also a common unit used to express the
1188:
667:
275:
2777:
2757:"Solar Energy Grew at a Record Pace in 2008 (excerpt from EERE Network News"
1964:
1920:(Report). Gaithersburg, MD: National Institute of Standards and Technology.
1212:"Kilowatt" and "Kilowatts" redirect here. For the musician James Watts, see
3238:
3195:
3180:
3135:
3115:
3032:
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1797:
1659:
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501:
204:
125:
45:
2268:
International
Comparison of Household Energy Consumption and Its Indicator
3110:
3065:
2833:
2662:
2638:"Satellite and Ocean Data Reveal Marked Increase in Earth's Heating Rate"
2637:
2610:
2530:
2384:
2175:
1885:
1881:
1718:
1613:
1581:
1403:
1268:
1240:
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2923:
was created from a revision of this article dated 18 July 2023
2507:
2275:
1753:
2538:
1889:
1674:
1655:
1580:(AC) electricity, another distinction is made between the watt and the
1441:
1433:
1425:
1399:
1371:
1244:
655:
440:
228:
93:
2145:
582:{\displaystyle \mathrm {1~W=1~V^{2}/\Omega =1~A^{2}{\cdot }\Omega } ,}
3175:
3090:
2451:
1812:
1670:
1628:
1562:
1522:
1128:
693:
1 Ω.) The watt was defined as equal to 10 units of power in the
439:(the latter unit, however, is used for a different quantity from the
37:"MWT" redirects here. For the former Australian theatre company, see
1714:
equivalent to approximately 114 megawatts of constant power output.
1428:, which achieved a power output of 1.25 PW by a process called
3055:
1585:
1448:, reached about 0.5 PW (0.3% of incident solar power) by 2019.
1100:
1091:
Powers measured in femtowatts are typically found in references to
267:
235:
152:
44:"Joules per second" redirects here, it should not be confused with
2174:. Bureau International des Poids et Mesures (BIPM). Archived from
1627:
would need to radiate to match the intensity of the transmitter's
3243:
3228:
3170:
3100:
3095:
3045:
2265:
Nakagami, Hidetoshi; Murakoshi, Chiharu; Iwafune, Yumiko (2008).
1739:
1112:
631:
243:
2367:"China's Shanxi to face 5–6 GW power shortage by yr-end – paper"
2099:
Report of the
British Association for the Advancement of Science
1191:
outputs about five milliwatts of light power, whereas a typical
1135:. One picowatt is the international standard reference value of
3258:
3160:
3070:
3050:
3040:
2948:
2365:
Bai, Jim; Chen, Aizhu (November 11, 2010). Lewis, Chris (ed.).
2115:
Lord Kelvin: His
Influence on Electrical Measurements and Units
1644:
1228:
675:
424:
216:
166:
142:
1227:
The kilowatt is typically used to express the output power of
3273:
3268:
3253:
3130:
3125:
3120:
3105:
3060:
2566:
World's most powerful laser: 2 000 trillion watts. What's it?
1722:
1460:
1096:
1092:
212:
138:
30:
This article is about the unit of power. For other uses, see
718:
watts. Texts written before 1948 are likely to be using the
3248:
3185:
2993:
2237:
1634:
670:
were named after leading physicists, Siemens proposed that
432:
2309:
Photovoltaic Industrial Systems: An Environmental Approach
1324:
Webster's International Dictionary of the English Language
3223:
3150:
3140:
2074:. Vol. 52. London: John Murray. 1883. pp. 1–33.
1200:
1199:
and other electronic signal levels are often measured in
590:
162:
2430:
9th International Conference on AC/DC Power Transmission
2264:
1942:
Comprehensive energy systems. Vol 1: Energy fundamentals
1335:
appeared in a November 28, 1947, article in the journal
2760:
2635:
2446:
2413:. Who are we: Nuclear (in French). 2011. Archived from
2335:. 2007–2008 Information Digest (Report). Vol. 19.
2016:(11th ed.), New York: Mc-Graw Hill, pp. 9–4,
1108:
134:
65:
2216:"Bye-Bye Batteries: Radio Waves as a Low-Power Source"
1382:
have been built with power ratings of up to 2 GW.
1155:
Powers measured in microwatts are typically stated in
2427:
2330:"Appendix A | U.S. Commercial Nuclear Power Reactors"
599:
510:
449:
288:
2276:
ACEEE Summer Study on Energy Efficiency in Buildings
1735:
1710:/ (365 days × 24 hours per day) ≈ 114 million watts,
649:
2706:"How Many? A Dictionary of Units of Measurement. M"
1259:) (on a clear day at midday, close to the equator).
500:for watt can be found using the above equation and
2481:Davies, J. H.; Davies, D. R. (February 22, 2010).
1669:is turned on for one hour, the energy used is 100
1275:; and some scientific research equipment, such as
1103:performance figures for sensitivity, quieting and
701:were dominant from 1909 until 1948. After the 9th
664:British Association for the Advancement of Science
605:
581:
486:
405:
254:in 1776. Watt's invention was fundamental for the
2014:Marks' Standard Handbook for Mechanical Engineers
1432:. The duration of the pulse was roughly 0.5
3340:
2339:. 1 August 2007. pp. 84–101. Archived from
678:through the difference of potential of a Volt".
2102:. Vol. 52nd Meeting (1882). April 3, 1883.
2044:The Science of measurement: A historical survey
1725:. One kilowatt hour is 3,600,000 watt seconds.
1243:. One kilowatt is approximately equal to 1.34
1239:power output of broadcast radio and television
2670:
2012:Avallone, Eugene A; et al., eds. (2007),
1912:
1888:generation drops to zero as the sun sets. See
1831:The energy in climbing the stairs is given by
1584:. While these units are equivalent for simple
1311:. The earliest citing of the megawatt in the
654:The watt is named after the Scottish inventor
3009:
2205:Morfey, C.L. (2001). Dictionary of Acoustics.
2112:
185:0.7375621 ft⋅lbf/s = 0.001341022 hp
2779:International Bureau of Weights and Measures
2480:
1966:International Bureau of Weights and Measures
1565:per second for delivered heating power in a
1535:International Bureau of Weights and Measures
1139:when this quantity is expressed in decibels.
487:{\displaystyle \mathrm {1~W=1~V{\cdot }A} .}
3300:Historical definitions of the SI base units
2710:University of North Carolina at Chapel Hill
2337:United States Nuclear Regulatory Commission
2136:
2134:
435:(V), meaning the watt is equivalent to the
3016:
3002:
2541:: Lawrence Livermore National Laboratory.
2456:"Global Direct Primary Energy Consumption"
1461:Conventions in the electric power industry
703:General Conference on Weights and Measures
2763:: Department of Energy). March 25, 2009.
2734:
2661:
2506:
1939:
1307:have net summer capacities between about
1219:"kW" redirects here. For other uses, see
274:against a constant opposing force of one
2931:, and does not reflect subsequent edits.
2914:
2462:. Published online at OurWorldInData.org
2131:
2117:. Peter Peregrinus: London. p. 51.
2011:
1913:Newell, David B; Tiesinga, Eite (2019).
1635:Distinction between watts and watt-hours
1505:produced by the plant. For example, the
1344:
2545:from the original on September 15, 2012
2364:
2172:"Resolution 12 of the 11th CGPM (1960)"
2140:
2037:
2035:
2033:
14:
3341:
2982:
2784:The International System of Units (SI)
2767:from the original on October 18, 2011.
2716:from the original on September 4, 2011
2060:
1971:The International System of Units (SI)
1915:The international system of units (SI)
1673:(W·h), 0.1 kilowatt hour, or 360
1283:typically have a peak power output of
2997:
2395:from the original on August 24, 2010.
2041:
1598:
1179:are typically measured in microwatts.
753:
750:
2676:
2617:from the original on August 30, 2011
2573:from the original on August 22, 2015
2289:from the original on January 9, 2015
2030:
1818:
1616:in units of watts, referring to the
1287:, while some produce much more. The
2983:Nelson, Robert A. (February 2000).
2703:
2599:
2594:from the original on August 8, 2015
2226:from the original on March 21, 2017
1977:(8th ed.), pp. 118, 144,
1378:has a peak output of 1.04 GW.
1247:. A small electric heater with one
1099:receivers. For example, meaningful
423:is performed when a current of one
24:
2973:
2901:
2590:(publicity release), August 2015,
2246:from the original on March 3, 2011
1784:(formerly known as a watt balance)
1721:is a unit of energy, equal to the
1620:. This refers to the power that a
1612:usually report the power of their
1358:United States Department of Energy
600:
572:
558:
545:
531:
518:
477:
469:
457:
387:
372:
363:
360:
348:
338:
330:
318:
308:
296:
25:
3370:
2976:"History of the electrical units"
2882:
2862:. Northern Arizona Wind and Sun.
2807:from the original on June 4, 2021
2531:"Crossing the Petawatt threshold"
2369:. Peking: Reuters. Archived from
1994:from the original on June 4, 2021
1591:, they differ when loads exhibit
650:Origin and adoption as an SI unit
3323:
3322:
2959:
2947:
2913:
2866:from the original on May 1, 2009
2569:, IFL Science, August 12, 2015,
2046:. New York: Dover. p. 239.
1766:
1752:
1738:
1525:are sometimes used, for example
1251:can use 1 kilowatt. The average
1083:is approximately 0.65 aW/m.
658:. The unit name was proposed by
419:, one watt is the rate at which
227:. The watt is named in honor of
219:or 1 kg⋅m⋅s. It is used to
2852:
2818:
2771:
2749:
2728:
2697:
2629:
2578:
2557:
2523:
2474:
2440:
2421:
2399:
2377:
2358:
2322:
2301:
2258:
2231:
2208:
2199:
2190:
2164:
2106:
2068:"Address by C. William Siemens"
2042:Klein, Herbert Arthur (1988) .
1869:
1859:
1485:produced by a generator, while
427:(A) flows across an electrical
3310:System of units of measurement
2090:
2078:
2005:
1958:
1933:
1906:
1825:
1481:) refers by convention to the
1451:
1291:, for example, uses more than
1203:, referenced to one milliwatt.
1195:uses less than one milliwatt.
1182:
1150:
1086:
13:
1:
2989:. Via Satellite. ATI courses.
2964:The dictionary definition of
2790:(8th ed.), p. 132,
1899:
1875:Watts per hour refers to the
1409:
1385:
1365:
1321:) is a reference in the 1900
1262:
1206:
1142:
1122:
1070:
728:International System of Units
231:(1736–1819), an 18th-century
209:International System of Units
3023:
2642:Geophysical Research Letters
1944:. Elsevier. pp. 12–13.
1788:Nominal power (photovoltaic)
1697:Power output = energy / time
733:
730:(SI) as the unit of power.
7:
2483:"Earth's surface heat flux"
1731:
1702:1 terawatt hour per year =
1507:Embalse nuclear power plant
1430:chirped pulse amplification
1297:diesel-electric locomotives
740:Orders of magnitude (power)
666:. Noting that units in the
624:
443:of an electrical circuit).
261:
10:
3375:
1808:Wattage conversion factors
1602:
1521:(i.e. electricity). Other
1414:
1376:Doel Nuclear Power Station
1360:video explaining gigawatts
1299:typically produce and use
1253:electric power consumption
1218:
1211:
737:
43:
36:
29:
3318:
3282:
3204:
3079:
3031:
2385:"Not on my beach, please"
2280:Pacific Grove, California
1513:to generate 2,109 MW
1314:Oxford English Dictionary
1058:
773:
770:
767:
764:
761:
758:
746:SI multiples of watt (W)
668:practical system of units
178:English Engineering Units
173:
148:
121:
117:
99:
89:
81:
71:
59:
54:
39:Melbourne Workers Theatre
3264:minute and second of arc
2826:"Avedøre Power Station (
1926:10.6028/nist.sp.330-2019
1618:effective radiated power
1605:Effective radiated power
1446:Earth's energy imbalance
1059:Common multiples are in
270:is held constant at one
27:SI derived unit of power
3305:2019 revision of the SI
2409:[Key numbers].
2157:Encyclopædia Britannica
2147:"Units, Physical"
1567:combined heat and power
1467:electric power industry
1417:List of petawatt lasers
1157:medical instrumentation
606:{\displaystyle \Omega }
2909:
2889:Listen to this article
2735:Cleveland, CJ (2007).
2113:Tunbridge, P. (1992).
1361:
1131:and in the science of
607:
583:
488:
407:
2908:
2742:Encyclopedia of Earth
2373:on November 21, 2020.
2242:. Datasheet Archive.
2142:Fleming, John Ambrose
2086:"Siemens, 1883, p. 6"
1571:Avedøre Power Station
1355:
1161:electroencephalograph
699:"international units"
619:electrical resistance
608:
584:
489:
408:
282:is done is one watt.
256:Industrial Revolution
32:Watt (disambiguation)
3206:Other accepted units
2956:at Wikimedia Commons
2940:More spoken articles
2860:"Inverter Selection"
2663:10.1029/2021GL093047
2307:Elena Papadopoulou,
1654:For example, when a
1593:electrical reactance
1509:in Argentina uses a
1309:500 and 1300 MW
1305:nuclear power plants
1281:electric locomotives
1214:KiloWatts (musician)
1171:for devices such as
1159:systems such as the
714:watt = 1.00019
597:
508:
447:
429:potential difference
286:
278:, the rate at which
3290:Conversion of units
2677:Williams, David R.
2654:2021GeoRL..4893047L
2508:10.5194/se-1-5-2010
2499:2010SolE....1....5D
2391:. August 19, 2010.
2346:on 16 February 2008
1793:One Watt Initiative
1578:alternating current
1527:gigawatt electrical
1471:megawatt electrical
1221:kW (disambiguation)
747:
240:mechanical engineer
112:... is equal to ...
3083:with special names
2910:
2220:The New York Times
1760:Engineering portal
1599:Radio transmission
1422:Lawrence Livermore
1362:
1165:electrocardiograph
745:
689:watt. (Also used:
660:C. William Siemens
636:rate of doing work
603:
579:
484:
403:
183:
175:
158:
150:
131:
123:
3336:
3335:
3214:astronomical unit
2952:Media related to
2906:
2840:on March 17, 2014
2460:Our World in Data
2417:on July 10, 2011.
2222:, July 18, 2010,
2178:on April 20, 2020
2023:978-0-07-142867-5
1819:Explanatory notes
1353:
1331:also states that
1231:and the power of
1107:require that the
1067:
1066:
556:
529:
517:
468:
456:
359:
329:
307:
295:
266:When an object's
246:who improved the
211:(SI), equal to 1
199:) is the unit of
189:
188:
100:Conversions
16:(Redirected from
3366:
3354:SI derived units
3326:
3325:
3018:
3011:
3004:
2995:
2994:
2990:
2979:
2974:Borvon, Gérard.
2963:
2951:
2930:
2928:
2917:
2916:
2907:
2897:
2895:
2890:
2876:
2875:
2873:
2871:
2856:
2850:
2849:
2847:
2845:
2836:. Archived from
2822:
2816:
2815:
2814:
2812:
2806:
2789:
2775:
2769:
2768:
2753:
2747:
2746:
2732:
2726:
2725:
2723:
2721:
2701:
2695:
2694:
2692:
2690:
2679:"Sun Fact Sheet"
2674:
2668:
2667:
2665:
2633:
2627:
2626:
2624:
2622:
2603:
2597:
2595:
2582:
2576:
2574:
2561:
2555:
2554:
2552:
2550:
2527:
2521:
2520:
2510:
2478:
2472:
2471:
2469:
2467:
2444:
2438:
2436:
2425:
2419:
2418:
2403:
2397:
2396:
2381:
2375:
2374:
2362:
2356:
2355:
2353:
2351:
2345:
2334:
2326:
2320:
2311:, Springer 2011
2305:
2299:
2298:
2296:
2294:
2288:
2273:
2262:
2256:
2255:
2253:
2251:
2235:
2229:
2227:
2212:
2206:
2203:
2197:
2194:
2188:
2187:
2185:
2183:
2168:
2162:
2161:
2149:
2138:
2129:
2128:
2110:
2104:
2103:
2094:
2088:
2082:
2076:
2075:
2064:
2058:
2057:
2039:
2028:
2026:
2009:
2003:
2002:
2001:
1999:
1993:
1976:
1962:
1956:
1955:
1937:
1931:
1930:§2.3.4, Table 4.
1929:
1919:
1910:
1893:
1873:
1867:
1863:
1857:
1855:
1848:
1841:
1834:
1829:
1776:
1771:
1770:
1762:
1757:
1756:
1748:
1743:
1742:
1709:
1707:
1685:Three Gorges Dam
1668:
1667:
1576:When describing
1569:station such as
1556:
1546:
1491:thermal megawatt
1487:megawatt thermal
1453:
1438:Osaka University
1411:
1387:
1367:
1354:
1310:
1302:
1294:
1286:
1264:
1257:solar irradiance
1208:
1184:
1152:
1144:
1124:
1088:
1072:
748:
744:
695:practical system
692:
612:
610:
609:
604:
588:
586:
585:
580:
575:
571:
566:
565:
554:
544:
539:
538:
527:
515:
498:unit conversions
493:
491:
490:
485:
480:
476:
466:
454:
417:electromagnetism
412:
410:
409:
404:
399:
398:
397:
385:
380:
379:
370:
357:
347:
346:
337:
327:
317:
316:
305:
293:
272:meter per second
184:
176:
169:
159:
151:
132:
124:
52:
51:
21:
3374:
3373:
3369:
3368:
3367:
3365:
3364:
3363:
3339:
3338:
3337:
3332:
3314:
3295:Metric prefixes
3278:
3200:
3082:
3075:
3027:
3022:
2944:
2943:
2932:
2926:
2924:
2921:This audio file
2918:
2911:
2902:
2899:
2893:
2892:
2888:
2885:
2880:
2879:
2869:
2867:
2858:
2857:
2853:
2843:
2841:
2824:
2823:
2819:
2810:
2808:
2804:
2798:
2787:
2776:
2772:
2755:
2754:
2750:
2733:
2729:
2719:
2717:
2704:Rowlett, Russ.
2702:
2698:
2688:
2686:
2675:
2671:
2634:
2630:
2620:
2618:
2605:
2604:
2600:
2584:
2583:
2579:
2563:
2562:
2558:
2548:
2546:
2529:
2528:
2524:
2479:
2475:
2465:
2463:
2445:
2441:
2426:
2422:
2407:"Chiffres clés"
2405:
2404:
2400:
2383:
2382:
2378:
2363:
2359:
2349:
2347:
2343:
2332:
2328:
2327:
2323:
2306:
2302:
2292:
2290:
2286:
2271:
2263:
2259:
2249:
2247:
2236:
2232:
2214:
2213:
2209:
2204:
2200:
2195:
2191:
2181:
2179:
2170:
2169:
2165:
2139:
2132:
2125:
2111:
2107:
2096:
2095:
2091:
2083:
2079:
2066:
2065:
2061:
2054:
2040:
2031:
2024:
2010:
2006:
1997:
1995:
1991:
1985:
1974:
1963:
1959:
1952:
1938:
1934:
1917:
1911:
1907:
1902:
1897:
1896:
1874:
1870:
1864:
1860:
1850:
1843:
1836:
1832:
1830:
1826:
1821:
1772:
1765:
1758:
1751:
1744:
1737:
1734:
1705:
1703:
1665:
1663:
1637:
1607:
1601:
1555:
1548:
1544:
1538:
1532:
1520:
1516:
1511:fission reactor
1500:
1496:
1480:
1463:
1419:
1380:HVDC converters
1345:
1308:
1301:3 and 5 MW
1300:
1292:
1284:
1249:heating element
1237:electromagnetic
1233:electric motors
1224:
1217:
1133:radio astronomy
1117:input impedance
1105:signal-to-noise
743:
736:
690:
652:
627:
615:SI derived unit
598:
595:
594:
567:
561:
557:
540:
534:
530:
511:
509:
506:
505:
496:Two additional
472:
450:
448:
445:
444:
421:electrical work
390:
386:
381:
375:
371:
366:
342:
341:
333:
312:
311:
289:
287:
284:
283:
264:
248:Newcomen engine
225:energy transfer
182:
174:
160:
157:
149:
130:
122:
48:
42:
35:
28:
23:
22:
15:
12:
11:
5:
3372:
3362:
3361:
3359:Units of power
3356:
3351:
3334:
3333:
3331:
3330:
3319:
3316:
3315:
3313:
3312:
3307:
3302:
3297:
3292:
3286:
3284:
3280:
3279:
3277:
3276:
3271:
3266:
3261:
3256:
3251:
3246:
3241:
3236:
3231:
3226:
3221:
3216:
3210:
3208:
3202:
3201:
3199:
3198:
3193:
3188:
3183:
3178:
3173:
3168:
3163:
3158:
3153:
3148:
3143:
3138:
3133:
3128:
3123:
3118:
3113:
3108:
3103:
3101:degree Celsius
3098:
3093:
3087:
3085:
3081:Derived units
3077:
3076:
3074:
3073:
3068:
3063:
3058:
3053:
3048:
3043:
3037:
3035:
3029:
3028:
3021:
3020:
3013:
3006:
2998:
2992:
2991:
2980:
2971:
2957:
2933:
2919:
2912:
2900:
2887:
2886:
2884:
2883:External links
2881:
2878:
2877:
2851:
2828:Avedøre værket
2817:
2796:
2770:
2748:
2727:
2696:
2669:
2628:
2598:
2577:
2556:
2522:
2473:
2448:Hannah Ritchie
2439:
2420:
2398:
2376:
2357:
2321:
2300:
2257:
2230:
2207:
2198:
2189:
2163:
2152:Chisholm, Hugh
2130:
2123:
2105:
2089:
2077:
2059:
2052:
2029:
2022:
2004:
1983:
1957:
1950:
1932:
1904:
1903:
1901:
1898:
1895:
1894:
1878:
1877:rate of change
1868:
1858:
1823:
1822:
1820:
1817:
1816:
1815:
1810:
1805:
1803:Solar constant
1800:
1795:
1790:
1785:
1782:Kibble balance
1778:
1777:
1774:Physics portal
1763:
1749:
1733:
1730:
1712:
1711:
1699:
1698:
1690:terawatt hours
1681:Power stations
1650:
1636:
1633:
1625:dipole antenna
1610:Radio stations
1603:Main article:
1600:
1597:
1553:
1542:
1530:
1518:
1514:
1498:
1494:
1483:electric power
1478:
1462:
1459:
1458:
1457:
1454:
1449:
1412:
1407:
1392:primary energy
1388:
1383:
1368:
1343:
1342:
1295:, while heavy
1285:5 or 6 MW
1277:supercolliders
1265:
1260:
1210:
1209:
1204:
1185:
1180:
1163:(EEG) and the
1153:
1148:
1145:
1140:
1125:
1120:
1089:
1084:
1077:sound pressure
1073:
1065:
1064:
1056:
1055:
1052:
1049:
1046:
1043:
1040:
1036:
1035:
1032:
1029:
1026:
1023:
1020:
1016:
1015:
1012:
1009:
1006:
1003:
1000:
996:
995:
992:
989:
986:
983:
980:
976:
975:
972:
969:
966:
963:
960:
956:
955:
950:
945:
942:
937:
932:
928:
927:
922:
917:
914:
909:
904:
900:
899:
894:
889:
886:
881:
876:
872:
871:
866:
861:
858:
853:
848:
844:
843:
838:
833:
830:
825:
820:
816:
815:
812:
809:
806:
803:
800:
796:
795:
792:
789:
786:
783:
780:
776:
775:
772:
769:
766:
763:
760:
756:
755:
752:
735:
732:
726:watt into the
697:of units. The
651:
648:
647:
646:
643:
626:
623:
602:
578:
574:
570:
564:
560:
553:
550:
547:
543:
537:
533:
526:
523:
520:
514:
483:
479:
475:
471:
465:
462:
459:
453:
402:
396:
393:
389:
384:
378:
374:
369:
365:
362:
356:
353:
350:
345:
340:
336:
332:
326:
323:
320:
315:
310:
304:
301:
298:
292:
263:
260:
187:
186:
180:
171:
170:
155:
146:
145:
128:
119:
118:
115:
114:
109:
102:
101:
97:
96:
91:
87:
86:
83:
79:
78:
73:
69:
68:
63:
57:
56:
26:
9:
6:
4:
3:
2:
3371:
3360:
3357:
3355:
3352:
3350:
3347:
3346:
3344:
3329:
3321:
3320:
3317:
3311:
3308:
3306:
3303:
3301:
3298:
3296:
3293:
3291:
3288:
3287:
3285:
3281:
3275:
3272:
3270:
3267:
3265:
3262:
3260:
3257:
3255:
3252:
3250:
3247:
3245:
3242:
3240:
3237:
3235:
3234:degree of arc
3232:
3230:
3227:
3225:
3222:
3220:
3217:
3215:
3212:
3211:
3209:
3207:
3203:
3197:
3194:
3192:
3189:
3187:
3184:
3182:
3179:
3177:
3174:
3172:
3169:
3167:
3164:
3162:
3159:
3157:
3154:
3152:
3149:
3147:
3144:
3142:
3139:
3137:
3134:
3132:
3129:
3127:
3124:
3122:
3119:
3117:
3114:
3112:
3109:
3107:
3104:
3102:
3099:
3097:
3094:
3092:
3089:
3088:
3086:
3084:
3078:
3072:
3069:
3067:
3064:
3062:
3059:
3057:
3054:
3052:
3049:
3047:
3044:
3042:
3039:
3038:
3036:
3034:
3030:
3026:
3019:
3014:
3012:
3007:
3005:
3000:
2999:
2996:
2988:
2987:
2981:
2977:
2972:
2970:at Wiktionary
2969:
2968:
2962:
2958:
2955:
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2865:
2861:
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2835:
2831:
2829:
2821:
2803:
2799:
2797:92-822-2213-6
2793:
2786:
2785:
2780:
2774:
2766:
2762:
2758:
2752:
2744:
2743:
2738:
2731:
2715:
2711:
2707:
2700:
2684:
2680:
2673:
2664:
2659:
2655:
2651:
2647:
2643:
2639:
2632:
2616:
2612:
2608:
2602:
2593:
2589:
2588:
2581:
2572:
2568:
2567:
2560:
2544:
2540:
2536:
2532:
2526:
2518:
2514:
2509:
2504:
2500:
2496:
2492:
2488:
2484:
2477:
2461:
2457:
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2449:
2443:
2435:
2431:
2424:
2416:
2412:
2408:
2402:
2394:
2390:
2389:The Economist
2386:
2380:
2372:
2368:
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2126:
2124:0-86341-237-8
2120:
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2109:
2101:
2100:
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2063:
2055:
2053:9780486144979
2049:
2045:
2038:
2036:
2034:
2025:
2019:
2015:
2008:
1990:
1986:
1984:92-822-2213-6
1980:
1973:
1972:
1967:
1961:
1953:
1951:9780128149256
1947:
1943:
1936:
1927:
1923:
1916:
1909:
1905:
1891:
1887:
1883:
1876:
1872:
1862:
1853:
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1828:
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1789:
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1747:
1746:Energy portal
1741:
1736:
1729:
1726:
1724:
1720:
1715:
1701:
1700:
1696:
1695:
1694:
1691:
1688:expressed as
1686:
1682:
1678:
1676:
1672:
1661:
1657:
1652:
1649:per unit time
1648:
1646:
1642:
1632:
1630:
1626:
1623:
1619:
1615:
1611:
1606:
1596:
1594:
1590:
1587:
1583:
1579:
1574:
1572:
1568:
1564:
1560:
1551:
1541:
1536:
1528:
1524:
1512:
1508:
1504:
1503:thermal power
1497:, or MWth, MW
1492:
1488:
1484:
1476:
1472:
1468:
1455:
1450:
1447:
1443:
1439:
1435:
1431:
1427:
1423:
1418:
1413:
1408:
1405:
1401:
1397:
1393:
1389:
1384:
1381:
1377:
1373:
1369:
1364:
1363:
1359:
1340:
1339:
1334:
1330:
1326:
1325:
1320:
1316:
1315:
1306:
1298:
1290:
1289:Eurostar e300
1282:
1278:
1274:
1270:
1266:
1261:
1258:
1254:
1250:
1246:
1242:
1238:
1234:
1230:
1226:
1225:
1222:
1215:
1205:
1202:
1198:
1197:Audio signals
1194:
1190:
1189:laser pointer
1186:
1181:
1178:
1174:
1170:
1166:
1162:
1158:
1154:
1149:
1146:
1141:
1138:
1134:
1130:
1126:
1121:
1119:of the tuner.
1118:
1114:
1110:
1106:
1102:
1098:
1094:
1090:
1085:
1082:
1078:
1074:
1069:
1068:
1062:
1057:
1053:
1050:
1047:
1044:
1041:
1038:
1037:
1033:
1030:
1027:
1024:
1021:
1018:
1017:
1013:
1010:
1007:
1004:
1001:
998:
997:
993:
990:
987:
984:
981:
978:
977:
973:
970:
967:
964:
961:
958:
957:
954:
951:
949:
946:
943:
941:
938:
936:
933:
930:
929:
926:
923:
921:
918:
915:
913:
910:
908:
905:
902:
901:
898:
895:
893:
890:
887:
885:
882:
880:
877:
874:
873:
870:
867:
865:
862:
859:
857:
854:
852:
849:
846:
845:
842:
839:
837:
834:
831:
829:
826:
824:
821:
818:
817:
813:
810:
807:
804:
801:
798:
797:
793:
790:
787:
784:
781:
778:
777:
757:
751:Submultiples
749:
741:
731:
729:
725:
721:
720:international
717:
716:international
713:
708:
707:international
705:in 1948, the
704:
700:
696:
688:
687:international
684:
683:international
679:
677:
673:
669:
665:
661:
657:
644:
641:
637:
633:
629:
628:
622:
620:
616:
592:
576:
568:
562:
551:
548:
541:
535:
524:
521:
512:
503:
499:
494:
481:
473:
463:
460:
451:
442:
438:
434:
430:
426:
422:
418:
413:
400:
394:
391:
382:
376:
367:
354:
351:
343:
334:
324:
321:
313:
302:
299:
290:
281:
277:
273:
269:
259:
257:
253:
250:with his own
249:
245:
241:
237:
234:
230:
226:
222:
218:
214:
210:
206:
202:
198:
194:
181:
179:
172:
168:
164:
156:
154:
147:
144:
140:
136:
129:
127:
126:SI base units
120:
116:
113:
110:
108:
104:
103:
98:
95:
92:
88:
84:
80:
77:
74:
70:
67:
64:
62:
58:
53:
50:
47:
40:
33:
19:
3239:electronvolt
3190:
2985:
2966:
2868:. Retrieved
2854:
2842:. Retrieved
2838:the original
2827:
2820:
2811:December 16,
2809:, retrieved
2783:
2773:
2751:
2740:
2730:
2718:. Retrieved
2699:
2689:February 26,
2687:. Retrieved
2682:
2672:
2645:
2641:
2631:
2619:. Retrieved
2601:
2587:Eureka alert
2586:
2580:
2565:
2559:
2547:. Retrieved
2525:
2490:
2486:
2476:
2464:. Retrieved
2459:
2442:
2429:
2423:
2415:the original
2410:
2401:
2388:
2379:
2371:the original
2360:
2348:. Retrieved
2341:the original
2324:
2308:
2303:
2293:February 14,
2291:. Retrieved
2267:
2260:
2248:. Retrieved
2233:
2219:
2210:
2201:
2192:
2180:. Retrieved
2176:the original
2166:
2155:
2114:
2108:
2098:
2092:
2080:
2071:
2062:
2043:
2013:
2007:
1998:December 16,
1996:, retrieved
1970:
1960:
1941:
1935:
1908:
1882:power plants
1871:
1861:
1851:
1844:
1837:
1827:
1798:Power factor
1727:
1716:
1713:
1679:
1660:power rating
1653:
1638:
1614:transmitters
1608:
1575:
1549:
1547:rather than
1539:
1526:
1501:) refers to
1490:
1486:
1474:
1470:
1464:
1404:microseconds
1336:
1332:
1328:
1323:
1318:
1312:
1273:data centers
1269:server farms
1241:transmitters
1060:
952:
947:
939:
934:
924:
919:
911:
906:
896:
891:
883:
878:
868:
863:
855:
850:
840:
835:
827:
822:
723:
719:
715:
711:
706:
694:
686:
682:
680:
671:
653:
639:
635:
495:
415:In terms of
414:
265:
252:steam engine
223:the rate of
205:radiant flux
196:
192:
190:
111:
106:
72:Unit of
49:
46:Joule-second
2834:DONG Energy
2613:: PMODWRC.
2493:(1): 5–24.
2487:Solid Earth
2466:February 9,
2350:27 December
2250:February 8,
1886:solar power
1719:watt-second
1708:10 W·h
1582:volt-ampere
1523:SI prefixes
1372:power grids
1193:hearing aid
1173:calculators
1169:solar cells
1137:sound power
1054:quettawatt
1045:quectowatt
437:volt-ampere
90:Named after
61:Unit system
3349:James Watt
3343:Categories
3033:Base units
2936:Audio help
2927:2023-07-18
2621:October 5,
2432:, London:
2411:Electrabel
2317:3642163017
1900:References
1890:duck curve
1835:. Setting
1671:watt hours
1656:light bulb
1639:The terms
1559:Ørsted A/S
1426:Nova laser
1415:See also:
1400:nanosecond
1293:12 MW
1245:horsepower
1187:A typical
1079:of 1
1048:10 W
1039:10 W
1034:ronnawatt
1028:10 W
1025:rontowatt
1019:10 W
1014:yottawatt
1008:10 W
1005:yoctowatt
999:10 W
994:zettawatt
988:10 W
985:zeptowatt
979:10 W
968:10 W
959:10 W
944:10 W
931:10 W
916:10 W
903:10 W
888:10 W
875:10 W
860:10 W
847:10 W
832:10 W
819:10 W
814:hectowatt
808:10 W
805:centiwatt
799:10 W
788:10 W
779:10 W
771:SI symbol
762:SI symbol
754:Multiples
656:James Watt
441:real power
229:James Watt
94:James Watt
3176:steradian
3091:becquerel
2870:March 27,
2844:March 17,
2535:Livermore
2517:1869-9510
2452:Max Roser
1847:= 9.8 m/s
1813:Wattmeter
1629:main lobe
1622:half-wave
1586:resistive
1563:megajoule
1452:Yottawatt
1183:Milliwatt
1151:Microwatt
1129:acoustics
1087:Femtowatt
965:attowatt
940:femtowatt
856:microwatt
828:milliwatt
794:decawatt
785:deciwatt
734:Multiples
613:) is the
601:Ω
573:Ω
569:⋅
546:Ω
502:Ohm's law
474:⋅
392:−
383:⋅
368:⋅
335:⋅
195:(symbol:
153:CGS units
105:1 W
18:Kilowatts
3328:Category
3283:See also
3056:kilogram
3025:SI units
2938: ·
2864:Archived
2802:archived
2781:(2006),
2765:Archived
2720:March 4,
2714:Archived
2683:nasa.gov
2615:Archived
2592:archived
2571:archived
2549:June 19,
2543:Archived
2454:(2020).
2393:Archived
2319:, p.153
2284:Archived
2244:Archived
2224:archived
2182:April 9,
2144:(1911).
1989:archived
1968:(2006),
1866:Iwafune.
1840:= 100 kg
1732:See also
1589:circuits
1493:(MWt, MW
1410:Petawatt
1386:Terawatt
1366:Gigawatt
1341:(506:2).
1333:megawatt
1263:Megawatt
1207:Kilowatt
1143:Nanowatt
1123:Picowatt
1113:decibels
1101:FM tuner
1071:Attowatt
974:exawatt
953:petawatt
925:terawatt
912:picowatt
897:gigawatt
884:nanowatt
869:megawatt
841:kilowatt
724:absolute
712:absolute
625:Examples
268:velocity
262:Overview
236:inventor
233:Scottish
221:quantify
161:10
3244:hectare
3229:decibel
3171:sievert
3166:siemens
3096:coulomb
3046:candela
2925: (
2896:minutes
2650:Bibcode
2495:Bibcode
2154:(ed.).
1658:with a
1552:= 270 W
1545:= 270 W
1533:). The
1465:In the
1338:Science
1303:. U.S.
1229:engines
1177:watches
632:gravity
431:of one
244:chemist
207:in the
141:⋅
137:⋅
3259:minute
3219:dalton
3161:radian
3156:pascal
3146:newton
3071:second
3051:kelvin
3041:ampere
2794:
2737:"Watt"
2685:. NASA
2648:(13).
2515:
2315:
2121:
2050:
2020:
1981:
1948:
1645:energy
1327:. The
768:Value
759:Value
676:Ampère
589:where
555:
528:
516:
467:
455:
425:ampere
358:
328:
306:
294:
276:newton
242:, and
217:second
107:in ...
82:Symbol
3274:tonne
3269:neper
3254:litre
3196:weber
3181:tesla
3136:lumen
3131:katal
3126:joule
3121:hertz
3116:henry
3106:farad
3061:metre
2805:(PDF)
2788:(PDF)
2344:(PDF)
2333:(PDF)
2287:(PDF)
2272:(PDF)
2150:. In
1992:(PDF)
1975:(PDF)
1918:(PDF)
1854:= 3 m
1723:joule
1641:power
1477:or MW
1396:Earth
1097:radar
1093:radio
1063:face
774:Name
765:Name
691:1 A ×
640:power
213:joule
201:power
76:power
3249:hour
3191:watt
3186:volt
3111:gray
3066:mole
2967:watt
2954:Watt
2872:2009
2846:2014
2813:2021
2792:ISBN
2722:2017
2691:2022
2623:2005
2551:2012
2513:ISSN
2468:2020
2352:2021
2313:ISBN
2295:2013
2252:2010
2184:2018
2119:ISBN
2048:ISBN
2018:ISBN
2000:2021
1979:ISBN
1946:ISBN
1849:and
1717:The
1643:and
1390:The
1175:and
1095:and
1061:bold
791:daW
672:watt
433:volt
280:work
215:per
193:watt
191:The
55:watt
3224:day
3151:ohm
3141:lux
2658:doi
2503:doi
2434:IET
1922:doi
1833:mgh
1664:100
1662:of
1529:(GW
1489:or
1475:MWe
1424:'s
1329:OED
1319:OED
1271:or
1201:dBm
1081:μPa
1051:QW
1042:qW
1031:RW
1022:rW
1011:YW
1002:yW
991:ZW
982:zW
971:EW
962:aW
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802:cW
782:dW
638:or
617:of
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1499:th
1469:,
1442:ps
1434:ps
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1109:RF
948:PW
935:fW
920:TW
907:pW
892:GW
879:nW
864:MW
851:μW
836:kW
823:mW
621:.
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238:,
135:kg
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