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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
1347:
1877:
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
707:
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
2897:
1372:. 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
409:
1863:
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
1690:
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:
1346:
585:
1442:. 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
2818:
2895:
696:
1265:
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
2896:
490:
1396:
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
1368:
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
1645:
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
1277:, 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
720:
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
283:
2566:
1535:, 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.,
1253:
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
643:
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.
609:
2830:
672:
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
2081:
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".
1113:
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
2326:
628:
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
505:
1392:
used by humans worldwide was about 160,000 terawatt-hours in 2019, corresponding to an average continuous power consumption of 18 TW that year.
2193:
Ainslie, M. A. (2015). A century of sonar: Planetary oceanography, underwater noise monitoring, and the terminology of underwater sound. Acoustics Today.
661:
1434:, giving a total energy of 600 J. Another example is the Laser for Fast Ignition Experiments (LFEX) at the Institute of Laser Engineering (ILE),
2240:
2912:
2610:
2280:
1726:
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.
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2403:
1986:
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1963:
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2704:
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2425:
Davidson, CC; Preedy, RM; Cao, J; Zhou, C; Fu, J (October 2010), "Ultra-High-Power
Thyristor Valves for HVDC in Developing Countries",
700:
1443:
2855:
2430:
2220:
2560:
2363:
444:
1419:
1165:(ECG), in a wide variety of scientific and engineering instruments and also in reference to radio and radar receivers. Compact
1418:
A petawatt can be produced by the current generation of lasers for time scales on the order of picoseconds. One such laser is
2018:
2708:
2279:: American Council for an Energy-Efficient Economy. Figure 3. Energy Consumption per Household by Fuel Type. 8:214–8:224.
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2337:
1355:
2789:
2119:
2048:
1980:
1947:
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2389:
2168:
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The power output of the Sun is 382.8 YW, about 2 billion times the power estimated to reach Earth's atmosphere.
3197:
1765:
1805:
1393:
3301:
2313:
58:
3016:
2452:
1912:
725:
206:
1785:
1504:
1427:
737:
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1938:
Yildiz, I.; Liu, Y. (2018). "Energy units, conversions, and dimensional analysis". In Dincer, I. (ed.).
1373:
1294:
1250:
1675:. This same amount of energy would light a 40-watt bulb for 2.5 hours, or a 50-watt bulb for 2 hours.
679:
In
October 1908, at the International Conference on Electric Units and Standards in London, so-called
3345:
2931:
2631:
Loeb, Norman G.; Johnson, Gregory C.; Thorsen, Tyler J.; Lyman, John M.; et al. (15 June 2021).
2276:
2236:
1311:
1234:
175:
38:
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definitions were established for practical electrical units. Siemens' definition was adopted as the
3255:
2602:
2263:
1615:
1602:
1170:
218:
17:
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2750:
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2411:
2082:
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1967:
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1414:
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3000:
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1400:
intervals. The average lightning strike peaks at 1 TW, but these strikes only last for 30
1145:
Powers measured in nanowatts are also typically used in reference to radio and radar receivers.
1109:
energy applied to the antenna input be specified. These input levels are often stated in dBf (
2945:
2735:
2530:
1158:
616:
594:
253:
31:
2069:
Report of the Fifty-Second meeting of the
British Association for the Advancement of Science
2976:
2927:
2644:
2603:"Construction of a Composite Total Solar Irradiance (TSI) Time Series from 1978 to present"
2490:
2212:
2157:. Vol. 27 (11th ed.). Cambridge University Press. pp. 738–745, see page 742.
2138:
1854:
gives 2940 J. Dividing this by the time taken (5 s) gives a power of 588 W.
1590:
1211:
1125:
Powers measured in picowatts are typically used in reference to radio and radar receivers,
657:
632:
times height divided by the time it takes to lift the object to the given height gives the
426:
2851:
2235:
Stetzler, Trudy; Magotra, Neeraj; Gelabert, Pedro; Kasthuri, Preethi; Bangalore, Sridevi.
8:
3340:
3281:
1790:
1575:
1302:
1278:
1218:
1174:
237:
2648:
2494:
1556:
404:{\displaystyle \mathrm {1~W=1~J{/}s=1~N{\cdot }m{/}s=1~kg{\cdot }m^{2}{\cdot }s^{-3}} .}
1757:
1586:
1162:
1154:
2367:
1882:
on an electric grid to compensate for loss of output from other sources, such as when
3319:
3205:
2993:
2785:
2508:
2309:
2115:
2044:
2014:
1976:
1943:
1619:
1335:
736:
For additional examples of magnitude for multiples and submultiples of the watt, see
249:
2237:"Low-Power Real-Time Programmable DSP Development Platform for Digital Hearing Aids"
1438:, which achieved a power output of 2 PW for a duration of approximately 1
1270:
2652:
2498:
1919:
1682:
1681:
are rated using units of power, typically megawatts or gigawatts (for example, the
1435:
1254:
1073:
The sound intensity in water corresponding to the international standard reference
414:
269:
1555:) and so these unit symbols are non-SI. In compliance with SI, the energy company
3072:
2094:
1638:
1508:
1246:
1130:
1114:
1102:
612:
495:
418:
245:
230:
198:
73:
1515:(i.e. heat), which creates steam to drive a turbine, which generates 648 MW
3225:
3157:
2730:
2700:
2478:
2444:
1800:
1779:
1771:
1622:
1607:
1480:
1389:
1377:
1230:
1074:
277:
222:
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The
International System of Units: Its History and Use in Science and Industry
660:
in August 1882 in his
President's Address to the Fifty-Second Congress of the
3334:
3286:
3210:
3147:
3137:
2512:
2148:
1923:
1743:
1687:
1678:
1559:
uses the unit megawatt for produced electrical power and the equivalent unit
1500:
1286:
1274:
1233:, tools, machines, and heaters. It is also a common unit used to express the
1186:
665:
273:
2771:
2751:"Solar Energy Grew at a Record Pace in 2008 (excerpt from EERE Network News"
1962:
1918:(Report). Gaithersburg, MD: National Institute of Standards and Technology.
1210:"Kilowatt" and "Kilowatts" redirect here. For the musician James Watts, see
3230:
3187:
3172:
3127:
3107:
3024:
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1795:
1657:
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499:
202:
123:
45:
2265:
International
Comparison of Household Energy Consumption and Its Indicator
3102:
3057:
2826:
2657:
2633:"Satellite and Ocean Data Reveal Marked Increase in Earth's Heating Rate"
2632:
2606:
2526:
2381:
2172:
1883:
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1611:
1579:
1401:
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2915:
was created from a revision of this article dated 18 July 2023
2503:
2272:
1751:
2534:
1887:
1672:
1653:
1578:(AC) electricity, another distinction is made between the watt and the
1439:
1431:
1423:
1397:
1369:
1242:
653:
438:
226:
91:
2142:
580:{\displaystyle \mathrm {1~W=1~V^{2}/\Omega =1~A^{2}{\cdot }\Omega } ,}
3167:
3082:
2448:
1810:
1668:
1626:
1560:
1520:
1126:
691:
1 Ω.) The watt was defined as equal to 10 units of power in the
437:(the latter unit, however, is used for a different quantity from the
37:"MWT" redirects here. For the former Australian theatre company, see
1712:
equivalent to approximately 114 megawatts of constant power output.
1426:, which achieved a power output of 1.25 PW by a process called
3047:
1583:
1446:, reached about 0.5 PW (0.3% of incident solar power) by 2019.
1098:
1089:
Powers measured in femtowatts are typically found in references to
265:
233:
150:
44:"Joules per second" redirects here, it should not be confused with
2171:. Bureau International des Poids et Mesures (BIPM). Archived from
1625:
would need to radiate to match the intensity of the transmitter's
3235:
3220:
3162:
3092:
3087:
3037:
2262:
Nakagami, Hidetoshi; Murakoshi, Chiharu; Iwafune, Yumiko (2008).
1737:
1110:
629:
241:
2364:"China's Shanxi to face 5–6 GW power shortage by yr-end – paper"
2096:
Report of the
British Association for the Advancement of Science
1189:
outputs about five milliwatts of light power, whereas a typical
1133:. One picowatt is the international standard reference value of
3250:
3152:
3062:
3042:
3032:
2940:
2112:
Lord Kelvin: His
Influence on Electrical Measurements and Units
1642:
1226:
673:
422:
214:
164:
140:
2362:
Bai, Jim; Chen, Aizhu (11 November 2010). Lewis, Chris (ed.).
1225:
The kilowatt is typically used to express the output power of
3265:
3260:
3245:
3122:
3117:
3112:
3097:
3052:
2562:
World's most powerful laser: 2 000 trillion watts. What's it?
1720:
1458:
1094:
1090:
210:
136:
30:
This article is about the unit of power. For other uses, see
716:
watts. Texts written before 1948 are likely to be using the
3240:
3177:
2985:
2234:
1632:
668:
were named after leading physicists, Siemens proposed that
430:
2306:
Photovoltaic Industrial Systems: An Environmental Approach
1322:
Webster's International Dictionary of the English Language
3215:
3142:
3132:
2071:. Vol. 52. London: John Murray. 1883. pp. 1–33.
1198:
1197:
and other electronic signal levels are often measured in
588:
160:
2427:
9th International Conference on AC/DC Power Transmission
2261:
1940:
Comprehensive energy systems. Vol 1: Energy fundamentals
2754:
2630:
2443:
2410:. Who are we: Nuclear (in French). 2011. Archived from
2332:. 2007–2008 Information Digest (Report). Vol. 19.
2013:(11th ed.), New York: Mc-Graw Hill, pp. 9–4,
1106:
132:
63:
2213:"Bye-Bye Batteries: Radio Waves as a Low-Power Source"
1380:
have been built with power ratings of up to 2 GW.
1333:
appeared in a 28 November 1947 article in the journal
1153:
Powers measured in microwatts are typically stated in
2424:
2327:"Appendix A | U.S. Commercial Nuclear Power Reactors"
597:
508:
447:
286:
2273:
ACEEE Summer Study on Energy Efficiency in Buildings
1733:
1708:/ (365 days × 24 hours per day) ≈ 114 million watts,
647:
2701:"How Many? A Dictionary of Units of Measurement. M"
1257:) (on a clear day at midday, close to the equator).
498:for watt can be found using the above equation and
1667:is turned on for one hour, the energy used is 100
1273:; and some scientific research equipment, such as
1101:performance figures for sensitivity, quieting and
699:were dominant from 1909 until 1948. After the 9th
662:British Association for the Advancement of Science
603:
579:
484:
403:
252:in 1776. Watt's invention was fundamental for the
2011:Marks' Standard Handbook for Mechanical Engineers
1430:. The duration of the pulse was roughly 0.5
3332:
2336:. 1 August 2007. pp. 84–101. Archived from
676:through the difference of potential of a Volt".
2099:. Vol. 52nd Meeting (1882). April 3, 1883.
2041:The Science of measurement: A historical survey
1723:. One kilowatt hour is 3,600,000 watt seconds.
1241:. One kilowatt is approximately equal to 1.34
1237:power output of broadcast radio and television
2665:
2009:Avallone, Eugene A; et al., eds. (2007),
1910:
1886:generation drops to zero as the sun sets. See
1829:The energy in climbing the stairs is given by
1582:. While these units are equivalent for simple
1309:. The earliest citing of the megawatt in the
652:The watt is named after the Scottish inventor
3001:
2202:Morfey, C.L. (2001). Dictionary of Acoustics.
2109:
183:0.7375621 ft⋅lbf/s = 0.001341022 hp
2773:International Bureau of Weights and Measures
2476:
1964:International Bureau of Weights and Measures
1563:per second for delivered heating power in a
1533:International Bureau of Weights and Measures
1137:when this quantity is expressed in decibels.
485:{\displaystyle \mathrm {1~W=1~V{\cdot }A} .}
3292:Historical definitions of the SI base units
2705:University of North Carolina at Chapel Hill
2477:Davies, J. H.; Davies, D. R. (2010-02-22).
2334:United States Nuclear Regulatory Commission
2133:
2131:
433:(V), meaning the watt is equivalent to the
3008:
2994:
2537:: Lawrence Livermore National Laboratory.
2453:"Global Direct Primary Energy Consumption"
1459:Conventions in the electric power industry
701:General Conference on Weights and Measures
2728:
2656:
2502:
1937:
1305:have net summer capacities between about
1217:"kW" redirects here. For other uses, see
272:against a constant opposing force of one
2923:, and does not reflect subsequent edits.
2906:
2757:: Department of Energy). 25 March 2009.
2459:. Published online at OurWorldInData.org
2128:
2114:. Peter Peregrinus: London. p. 51.
2008:
1911:Newell, David B; Tiesinga, Eite (2019).
1633:Distinction between watts and watt-hours
1503:produced by the plant. For example, the
1342:
2361:
2169:"Resolution 12 of the 11th CGPM (1960)"
2137:
2034:
2032:
2030:
14:
3333:
2974:
2778:The International System of Units (SI)
2541:from the original on 15 September 2012
2057:
1969:The International System of Units (SI)
1913:The international system of units (SI)
1671:(W·h), 0.1 kilowatt hour, or 360
1281:typically have a peak power output of
2989:
2761:from the original on 18 October 2011.
2038:
1596:
1177:are typically measured in microwatts.
751:
748:
2671:
2392:from the original on 24 August 2010.
2027:
1816:
1614:in units of watts, referring to the
1285:, while some produce much more. The
2975:Nelson, Robert A. (February 2000).
2698:
2595:
2286:from the original on 9 January 2015
1975:(8th ed.), pp. 118, 144,
1376:has a peak output of 1.04 GW.
1245:. A small electric heater with one
1097:receivers. For example, meaningful
421:is performed when a current of one
24:
2965:
2893:
1782:(formerly known as a watt balance)
1719:is a unit of energy, equal to the
1618:. This refers to the power that a
1610:usually report the power of their
1356:United States Department of Energy
598:
570:
556:
543:
529:
516:
475:
467:
455:
385:
370:
361:
358:
346:
336:
328:
316:
306:
294:
25:
3362:
2968:"History of the electrical units"
2874:
2854:. Northern Arizona Wind and Sun.
2527:"Crossing the Petawatt threshold"
2366:. Peking: Reuters. Archived from
2243:from the original on 3 March 2011
1589:, they differ when loads exhibit
648:Origin and adoption as an SI unit
3315:
3314:
2951:
2939:
2905:
2043:. New York: Dover. p. 239.
1764:
1750:
1736:
1523:are sometimes used, for example
1249:can use 1 kilowatt. The average
1081:is approximately 0.65 aW/m.
656:. The unit name was proposed by
417:, one watt is the rate at which
225:. The watt is named in honor of
217:or 1 kg⋅m⋅s. It is used to
2858:from the original on 1 May 2009
2844:
2811:
2801:from the original on 2021-06-04
2765:
2743:
2722:
2711:from the original on 2011-09-04
2692:
2624:
2613:from the original on 2011-08-30
2590:from the original on 2015-08-08
2586:(publicity release), Aug 2015,
2574:
2569:from the original on 2015-08-22
2565:, IFL Science, 12 August 2015,
2553:
2519:
2470:
2437:
2418:
2396:
2374:
2355:
2319:
2298:
2255:
2228:
2223:from the original on 2017-03-21
2205:
2196:
2187:
2161:
2103:
2065:"Address by C. William Siemens"
2039:Klein, Herbert Arthur (1988) .
1992:from the original on 2021-06-04
1867:
1857:
1483:produced by a generator, while
425:(A) flows across an electrical
3302:System of units of measurement
2087:
2075:
2002:
1956:
1931:
1904:
1823:
1479:) refers by convention to the
1449:
1289:, for example, uses more than
1201:, referenced to one milliwatt.
1193:uses less than one milliwatt.
1180:
1148:
1084:
13:
1:
2981:. Via Satellite. ATI courses.
2956:The dictionary definition of
2784:(8th ed.), p. 132,
1897:
1873:Watts per hour refers to the
1407:
1383:
1363:
1319:) is a reference in the 1900
1260:
1204:
1140:
1120:
1068:
726:International System of Units
229:(1736–1819), an 18th-century
207:International System of Units
3015:
2637:Geophysical Research Letters
1942:. Elsevier. pp. 12–13.
1786:Nominal power (photovoltaic)
1695:Power output = energy / time
731:
728:(SI) as the unit of power.
7:
2479:"Earth's surface heat flux"
1729:
1700:1 terawatt hour per year =
1505:Embalse nuclear power plant
1428:chirped pulse amplification
1295:diesel-electric locomotives
738:Orders of magnitude (power)
664:. Noting that units in the
622:
441:of an electrical circuit).
259:
10:
3367:
1806:Wattage conversion factors
1600:
1519:(i.e. electricity). Other
1412:
1374:Doel Nuclear Power Station
1358:video explaining gigawatts
1297:typically produce and use
1251:electric power consumption
1216:
1209:
735:
43:
36:
29:
3310:
3274:
3196:
3071:
3023:
2382:"Not on my beach, please"
2277:Pacific Grove, California
1511:to generate 2,109 MW
1312:Oxford English Dictionary
1056:
771:
768:
765:
762:
759:
756:
744:SI multiples of watt (W)
666:practical system of units
176:English Engineering Units
171:
146:
119:
115:
97:
87:
79:
69:
57:
52:
39:Melbourne Workers Theatre
3256:minute and second of arc
2819:"Avedøre Power Station (
1924:10.6028/nist.sp.330-2019
1616:effective radiated power
1603:Effective radiated power
1444:Earth's energy imbalance
1057:Common multiples are in
268:is held constant at one
27:SI derived unit of power
3297:2019 revision of the SI
2406:[Key numbers].
2154:Encyclopædia Britannica
2144:"Units, Physical"
1565:combined heat and power
1465:electric power industry
1415:List of petawatt lasers
1155:medical instrumentation
604:{\displaystyle \Omega }
2901:
2881:Listen to this article
2729:Cleveland, CJ (2007).
2110:Tunbridge, P. (1992).
1359:
1129:and in the science of
605:
581:
486:
405:
2900:
2736:Encyclopedia of Earth
2370:on November 21, 2020.
2239:. Datasheet Archive.
2139:Fleming, John Ambrose
2083:"Siemens, 1883, p. 6"
1569:Avedøre Power Station
1353:
1159:electroencephalograph
697:"international units"
617:electrical resistance
606:
582:
487:
406:
280:is done is one watt.
254:Industrial Revolution
32:Watt (disambiguation)
3198:Other accepted units
2948:at Wikimedia Commons
2932:More spoken articles
2852:"Inverter Selection"
2658:10.1029/2021GL093047
2304:Elena Papadopoulou,
1652:For example, when a
1591:electrical reactance
1507:in Argentina uses a
1307:500 and 1300 MW
1303:nuclear power plants
1279:electric locomotives
1212:KiloWatts (musician)
1169:for devices such as
1157:systems such as the
712:watt = 1.00019
595:
506:
445:
427:potential difference
284:
276:, the rate at which
3282:Conversion of units
2672:Williams, David R.
2649:2021GeoRL..4893047L
2504:10.5194/se-1-5-2010
2495:2010SolE....1....5D
2343:on 16 February 2008
1791:One Watt Initiative
1576:alternating current
1525:gigawatt electrical
1469:megawatt electrical
1219:kW (disambiguation)
745:
238:mechanical engineer
110:... is equal to ...
3075:with special names
2902:
2388:. 19 August 2010.
2217:The New York Times
1758:Engineering portal
1597:Radio transmission
1420:Lawrence Livermore
1360:
1163:electrocardiograph
743:
687:watt. (Also used:
658:C. William Siemens
634:rate of doing work
601:
577:
482:
401:
181:
173:
156:
148:
129:
121:
3328:
3327:
3206:astronomical unit
2944:Media related to
2898:
2457:Our World in Data
2175:on April 20, 2020
2020:978-0-07-142867-5
1817:Explanatory notes
1351:
1329:also states that
1229:and the power of
1105:require that the
1065:
1064:
554:
527:
515:
466:
454:
357:
327:
305:
293:
264:When an object's
244:who improved the
209:(SI), equal to 1
197:) is the unit of
187:
186:
98:Conversions
16:(Redirected from
3358:
3346:SI derived units
3318:
3317:
3010:
3003:
2996:
2987:
2986:
2982:
2971:
2966:Borvon, Gérard.
2955:
2943:
2922:
2920:
2909:
2908:
2899:
2889:
2887:
2882:
2868:
2867:
2865:
2863:
2848:
2842:
2841:
2839:
2838:
2829:. Archived from
2815:
2809:
2808:
2807:
2806:
2800:
2783:
2769:
2763:
2762:
2747:
2741:
2740:
2726:
2720:
2719:
2717:
2716:
2696:
2690:
2689:
2687:
2685:
2674:"Sun Fact Sheet"
2669:
2663:
2662:
2660:
2628:
2622:
2621:
2619:
2618:
2599:
2593:
2591:
2578:
2572:
2570:
2557:
2551:
2550:
2548:
2546:
2523:
2517:
2516:
2506:
2474:
2468:
2467:
2465:
2464:
2441:
2435:
2433:
2422:
2416:
2415:
2400:
2394:
2393:
2378:
2372:
2371:
2359:
2353:
2352:
2350:
2348:
2342:
2331:
2323:
2317:
2308:, Springer 2011
2302:
2296:
2295:
2293:
2291:
2285:
2270:
2259:
2253:
2252:
2250:
2248:
2232:
2226:
2224:
2219:, Jul 18, 2010,
2209:
2203:
2200:
2194:
2191:
2185:
2184:
2182:
2180:
2165:
2159:
2158:
2146:
2135:
2126:
2125:
2107:
2101:
2100:
2091:
2085:
2079:
2073:
2072:
2061:
2055:
2054:
2036:
2025:
2023:
2006:
2000:
1999:
1998:
1997:
1991:
1974:
1960:
1954:
1953:
1935:
1929:
1928:§2.3.4, Table 4.
1927:
1917:
1908:
1891:
1871:
1865:
1861:
1855:
1853:
1846:
1839:
1832:
1827:
1774:
1769:
1768:
1760:
1755:
1754:
1746:
1741:
1740:
1707:
1705:
1683:Three Gorges Dam
1666:
1665:
1574:When describing
1567:station such as
1554:
1544:
1489:thermal megawatt
1485:megawatt thermal
1451:
1436:Osaka University
1409:
1385:
1365:
1352:
1308:
1300:
1292:
1284:
1262:
1255:solar irradiance
1206:
1182:
1150:
1142:
1122:
1086:
1070:
746:
742:
693:practical system
690:
610:
608:
607:
602:
586:
584:
583:
578:
573:
569:
564:
563:
552:
542:
537:
536:
525:
513:
496:unit conversions
491:
489:
488:
483:
478:
474:
464:
452:
415:electromagnetism
410:
408:
407:
402:
397:
396:
395:
383:
378:
377:
368:
355:
345:
344:
335:
325:
315:
314:
303:
291:
270:meter per second
182:
174:
167:
157:
149:
130:
122:
50:
49:
21:
3366:
3365:
3361:
3360:
3359:
3357:
3356:
3355:
3331:
3330:
3329:
3324:
3306:
3287:Metric prefixes
3270:
3192:
3074:
3067:
3019:
3014:
2936:
2935:
2924:
2918:
2916:
2913:This audio file
2910:
2903:
2894:
2891:
2885:
2884:
2880:
2877:
2872:
2871:
2861:
2859:
2850:
2849:
2845:
2836:
2834:
2817:
2816:
2812:
2804:
2802:
2798:
2792:
2781:
2770:
2766:
2749:
2748:
2744:
2727:
2723:
2714:
2712:
2699:Rowlett, Russ.
2697:
2693:
2683:
2681:
2670:
2666:
2629:
2625:
2616:
2614:
2601:
2600:
2596:
2580:
2579:
2575:
2559:
2558:
2554:
2544:
2542:
2525:
2524:
2520:
2475:
2471:
2462:
2460:
2442:
2438:
2423:
2419:
2404:"Chiffres clés"
2402:
2401:
2397:
2380:
2379:
2375:
2360:
2356:
2346:
2344:
2340:
2329:
2325:
2324:
2320:
2303:
2299:
2289:
2287:
2283:
2268:
2260:
2256:
2246:
2244:
2233:
2229:
2211:
2210:
2206:
2201:
2197:
2192:
2188:
2178:
2176:
2167:
2166:
2162:
2136:
2129:
2122:
2108:
2104:
2093:
2092:
2088:
2080:
2076:
2063:
2062:
2058:
2051:
2037:
2028:
2021:
2007:
2003:
1995:
1993:
1989:
1983:
1972:
1961:
1957:
1950:
1936:
1932:
1915:
1909:
1905:
1900:
1895:
1894:
1872:
1868:
1862:
1858:
1848:
1841:
1834:
1830:
1828:
1824:
1819:
1770:
1763:
1756:
1749:
1742:
1735:
1732:
1703:
1701:
1663:
1661:
1635:
1605:
1599:
1553:
1546:
1542:
1536:
1530:
1518:
1514:
1509:fission reactor
1498:
1494:
1478:
1461:
1417:
1378:HVDC converters
1343:
1306:
1299:3 and 5 MW
1298:
1290:
1282:
1247:heating element
1235:electromagnetic
1231:electric motors
1222:
1215:
1131:radio astronomy
1115:input impedance
1103:signal-to-noise
741:
734:
688:
650:
625:
613:SI derived unit
596:
593:
592:
565:
559:
555:
538:
532:
528:
509:
507:
504:
503:
494:Two additional
470:
448:
446:
443:
442:
419:electrical work
388:
384:
379:
373:
369:
364:
340:
339:
331:
310:
309:
287:
285:
282:
281:
262:
246:Newcomen engine
223:energy transfer
180:
172:
158:
155:
147:
128:
120:
48:
42:
35:
28:
23:
22:
15:
12:
11:
5:
3364:
3354:
3353:
3351:Units of power
3348:
3343:
3326:
3325:
3323:
3322:
3311:
3308:
3307:
3305:
3304:
3299:
3294:
3289:
3284:
3278:
3276:
3272:
3271:
3269:
3268:
3263:
3258:
3253:
3248:
3243:
3238:
3233:
3228:
3223:
3218:
3213:
3208:
3202:
3200:
3194:
3193:
3191:
3190:
3185:
3180:
3175:
3170:
3165:
3160:
3155:
3150:
3145:
3140:
3135:
3130:
3125:
3120:
3115:
3110:
3105:
3100:
3095:
3093:degree Celsius
3090:
3085:
3079:
3077:
3073:Derived units
3069:
3068:
3066:
3065:
3060:
3055:
3050:
3045:
3040:
3035:
3029:
3027:
3021:
3020:
3013:
3012:
3005:
2998:
2990:
2984:
2983:
2972:
2963:
2949:
2925:
2911:
2904:
2892:
2879:
2878:
2876:
2875:External links
2873:
2870:
2869:
2843:
2821:Avedøre værket
2810:
2790:
2764:
2742:
2721:
2691:
2664:
2623:
2594:
2573:
2552:
2518:
2469:
2445:Hannah Ritchie
2436:
2417:
2414:on 2011-07-10.
2395:
2373:
2354:
2318:
2297:
2254:
2227:
2204:
2195:
2186:
2160:
2149:Chisholm, Hugh
2127:
2120:
2102:
2086:
2074:
2056:
2049:
2026:
2019:
2001:
1981:
1955:
1948:
1930:
1902:
1901:
1899:
1896:
1893:
1892:
1876:
1875:rate of change
1866:
1856:
1821:
1820:
1818:
1815:
1814:
1813:
1808:
1803:
1801:Solar constant
1798:
1793:
1788:
1783:
1780:Kibble balance
1776:
1775:
1772:Physics portal
1761:
1747:
1731:
1728:
1710:
1709:
1697:
1696:
1688:terawatt hours
1679:Power stations
1648:
1634:
1631:
1623:dipole antenna
1608:Radio stations
1601:Main article:
1598:
1595:
1551:
1540:
1528:
1516:
1512:
1496:
1492:
1481:electric power
1476:
1460:
1457:
1456:
1455:
1452:
1447:
1410:
1405:
1390:primary energy
1386:
1381:
1366:
1341:
1340:
1293:, while heavy
1283:5 or 6 MW
1275:supercolliders
1263:
1258:
1208:
1207:
1202:
1183:
1178:
1161:(EEG) and the
1151:
1146:
1143:
1138:
1123:
1118:
1087:
1082:
1075:sound pressure
1071:
1063:
1062:
1054:
1053:
1050:
1047:
1044:
1041:
1038:
1034:
1033:
1030:
1027:
1024:
1021:
1018:
1014:
1013:
1010:
1007:
1004:
1001:
998:
994:
993:
990:
987:
984:
981:
978:
974:
973:
970:
967:
964:
961:
958:
954:
953:
948:
943:
940:
935:
930:
926:
925:
920:
915:
912:
907:
902:
898:
897:
892:
887:
884:
879:
874:
870:
869:
864:
859:
856:
851:
846:
842:
841:
836:
831:
828:
823:
818:
814:
813:
810:
807:
804:
801:
798:
794:
793:
790:
787:
784:
781:
778:
774:
773:
770:
767:
764:
761:
758:
754:
753:
750:
733:
730:
724:watt into the
695:of units. The
649:
646:
645:
644:
641:
624:
621:
600:
576:
572:
568:
562:
558:
551:
548:
545:
541:
535:
531:
524:
521:
518:
512:
481:
477:
473:
469:
463:
460:
457:
451:
400:
394:
391:
387:
382:
376:
372:
367:
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360:
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321:
318:
313:
308:
302:
299:
296:
290:
261:
258:
185:
184:
178:
169:
168:
153:
144:
143:
126:
117:
116:
113:
112:
107:
100:
99:
95:
94:
89:
85:
84:
81:
77:
76:
71:
67:
66:
61:
55:
54:
26:
9:
6:
4:
3:
2:
3363:
3352:
3349:
3347:
3344:
3342:
3339:
3338:
3336:
3321:
3313:
3312:
3309:
3303:
3300:
3298:
3295:
3293:
3290:
3288:
3285:
3283:
3280:
3279:
3277:
3273:
3267:
3264:
3262:
3259:
3257:
3254:
3252:
3249:
3247:
3244:
3242:
3239:
3237:
3234:
3232:
3229:
3227:
3226:degree of arc
3224:
3222:
3219:
3217:
3214:
3212:
3209:
3207:
3204:
3203:
3201:
3199:
3195:
3189:
3186:
3184:
3181:
3179:
3176:
3174:
3171:
3169:
3166:
3164:
3161:
3159:
3156:
3154:
3151:
3149:
3146:
3144:
3141:
3139:
3136:
3134:
3131:
3129:
3126:
3124:
3121:
3119:
3116:
3114:
3111:
3109:
3106:
3104:
3101:
3099:
3096:
3094:
3091:
3089:
3086:
3084:
3081:
3080:
3078:
3076:
3070:
3064:
3061:
3059:
3056:
3054:
3051:
3049:
3046:
3044:
3041:
3039:
3036:
3034:
3031:
3030:
3028:
3026:
3022:
3018:
3011:
3006:
3004:
2999:
2997:
2992:
2991:
2988:
2980:
2979:
2973:
2969:
2964:
2962:at Wiktionary
2961:
2960:
2954:
2950:
2947:
2942:
2938:
2937:
2933:
2929:
2914:
2857:
2853:
2847:
2833:on 2014-03-17
2832:
2828:
2824:
2822:
2814:
2797:
2793:
2791:92-822-2213-6
2787:
2780:
2779:
2774:
2768:
2760:
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2752:
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2738:
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2725:
2710:
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2679:
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2589:
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2577:
2568:
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2556:
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2500:
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2480:
2473:
2458:
2454:
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2446:
2440:
2432:
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2421:
2413:
2409:
2405:
2399:
2391:
2387:
2386:The Economist
2383:
2377:
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2365:
2358:
2339:
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2190:
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2156:
2155:
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2134:
2132:
2123:
2121:0-86341-237-8
2117:
2113:
2106:
2098:
2097:
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2084:
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2070:
2066:
2060:
2052:
2050:9780486144979
2046:
2042:
2035:
2033:
2031:
2022:
2016:
2012:
2005:
1988:
1984:
1982:92-822-2213-6
1978:
1971:
1970:
1965:
1959:
1951:
1949:9780128149256
1945:
1941:
1934:
1925:
1921:
1914:
1907:
1903:
1889:
1885:
1881:
1874:
1870:
1860:
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1767:
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1745:
1744:Energy portal
1739:
1734:
1727:
1724:
1722:
1718:
1713:
1699:
1698:
1694:
1693:
1692:
1689:
1686:expressed as
1684:
1680:
1676:
1674:
1670:
1659:
1655:
1650:
1647:per unit time
1646:
1644:
1640:
1630:
1628:
1624:
1621:
1617:
1613:
1609:
1604:
1594:
1592:
1588:
1585:
1581:
1577:
1572:
1570:
1566:
1562:
1558:
1549:
1539:
1534:
1526:
1522:
1510:
1506:
1502:
1501:thermal power
1495:, or MWth, MW
1490:
1486:
1482:
1474:
1470:
1466:
1453:
1448:
1445:
1441:
1437:
1433:
1429:
1425:
1421:
1416:
1411:
1406:
1403:
1399:
1395:
1391:
1387:
1382:
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1371:
1367:
1362:
1361:
1357:
1338:
1337:
1332:
1328:
1324:
1323:
1318:
1314:
1313:
1304:
1296:
1288:
1287:Eurostar e300
1280:
1276:
1272:
1268:
1264:
1259:
1256:
1252:
1248:
1244:
1240:
1236:
1232:
1228:
1224:
1223:
1220:
1213:
1203:
1200:
1196:
1195:Audio signals
1192:
1188:
1187:laser pointer
1184:
1179:
1176:
1172:
1168:
1164:
1160:
1156:
1152:
1147:
1144:
1139:
1136:
1132:
1128:
1124:
1119:
1117:of the tuner.
1116:
1112:
1108:
1104:
1100:
1096:
1092:
1088:
1083:
1080:
1076:
1072:
1067:
1066:
1060:
1055:
1051:
1048:
1045:
1042:
1039:
1036:
1035:
1031:
1028:
1025:
1022:
1019:
1016:
1015:
1011:
1008:
1005:
1002:
999:
996:
995:
991:
988:
985:
982:
979:
976:
975:
971:
968:
965:
962:
959:
956:
955:
952:
949:
947:
944:
941:
939:
936:
934:
931:
928:
927:
924:
921:
919:
916:
913:
911:
908:
906:
903:
900:
899:
896:
893:
891:
888:
885:
883:
880:
878:
875:
872:
871:
868:
865:
863:
860:
857:
855:
852:
850:
847:
844:
843:
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835:
832:
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822:
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805:
802:
799:
796:
795:
791:
788:
785:
782:
779:
776:
775:
755:
749:Submultiples
747:
739:
729:
727:
723:
719:
718:international
715:
714:international
711:
706:
705:international
703:in 1948, the
702:
698:
694:
686:
685:international
682:
681:international
677:
675:
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667:
663:
659:
655:
642:
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631:
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574:
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522:
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510:
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332:
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248:with his own
247:
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196:
192:
179:
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162:
154:
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145:
142:
138:
134:
127:
125:
124:SI base units
118:
114:
111:
108:
106:
102:
101:
96:
93:
90:
86:
82:
78:
75:
72:
68:
65:
62:
60:
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40:
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3231:electronvolt
3182:
2977:
2958:
2860:. Retrieved
2846:
2835:. Retrieved
2831:the original
2820:
2813:
2803:, retrieved
2777:
2767:
2745:
2734:
2724:
2713:. Retrieved
2694:
2682:. Retrieved
2677:
2667:
2640:
2636:
2626:
2615:. Retrieved
2597:
2583:Eureka alert
2582:
2576:
2561:
2555:
2543:. Retrieved
2521:
2486:
2482:
2472:
2461:. Retrieved
2456:
2439:
2426:
2420:
2412:the original
2407:
2398:
2385:
2376:
2368:the original
2357:
2345:. Retrieved
2338:the original
2321:
2305:
2300:
2288:. Retrieved
2264:
2257:
2245:. Retrieved
2230:
2216:
2207:
2198:
2189:
2177:. Retrieved
2173:the original
2163:
2152:
2111:
2105:
2095:
2089:
2077:
2068:
2059:
2040:
2010:
2004:
1994:, retrieved
1968:
1958:
1939:
1933:
1906:
1880:power plants
1869:
1859:
1849:
1842:
1835:
1825:
1796:Power factor
1725:
1714:
1711:
1677:
1658:power rating
1651:
1636:
1612:transmitters
1606:
1573:
1547:
1545:rather than
1537:
1524:
1499:) refers to
1488:
1484:
1472:
1468:
1462:
1402:microseconds
1334:
1330:
1326:
1321:
1316:
1310:
1271:data centers
1267:server farms
1239:transmitters
1058:
950:
945:
937:
932:
922:
917:
909:
904:
894:
889:
881:
876:
866:
861:
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848:
838:
833:
825:
820:
721:
717:
713:
709:
704:
692:
684:
680:
678:
669:
651:
637:
633:
493:
413:In terms of
412:
263:
250:steam engine
221:the rate of
203:radiant flux
194:
190:
188:
109:
104:
70:Unit of
46:Joule-second
2827:DONG Energy
2684:26 February
2609:: PMODWRC.
2489:(1): 5–24.
2483:Solid Earth
2347:27 December
2290:14 February
1884:solar power
1717:watt-second
1706:10 W·h
1580:volt-ampere
1521:SI prefixes
1370:power grids
1191:hearing aid
1171:calculators
1167:solar cells
1135:sound power
1052:quettawatt
1043:quectowatt
435:volt-ampere
88:Named after
59:Unit system
3341:James Watt
3335:Categories
3025:Base units
2928:Audio help
2919:2023-07-18
2837:2014-03-17
2805:2021-12-16
2715:2017-03-04
2617:2005-10-05
2463:2020-02-09
2429:, London:
2408:Electrabel
2314:3642163017
2247:8 February
1996:2021-12-16
1898:References
1888:duck curve
1833:. Setting
1669:watt hours
1654:light bulb
1637:The terms
1557:Ørsted A/S
1424:Nova laser
1413:See also:
1398:nanosecond
1291:12 MW
1243:horsepower
1185:A typical
1077:of 1
1046:10 W
1037:10 W
1032:ronnawatt
1026:10 W
1023:rontowatt
1017:10 W
1012:yottawatt
1006:10 W
1003:yoctowatt
997:10 W
992:zettawatt
986:10 W
983:zeptowatt
977:10 W
966:10 W
957:10 W
942:10 W
929:10 W
914:10 W
901:10 W
886:10 W
873:10 W
858:10 W
845:10 W
830:10 W
817:10 W
812:hectowatt
806:10 W
803:centiwatt
797:10 W
786:10 W
777:10 W
769:SI symbol
760:SI symbol
752:Multiples
654:James Watt
439:real power
227:James Watt
92:James Watt
3168:steradian
3083:becquerel
2531:Livermore
2513:1869-9510
2449:Max Roser
1845:= 9.8 m/s
1811:Wattmeter
1627:main lobe
1620:half-wave
1584:resistive
1561:megajoule
1450:Yottawatt
1181:Milliwatt
1149:Microwatt
1127:acoustics
1085:Femtowatt
963:attowatt
938:femtowatt
854:microwatt
826:milliwatt
792:decawatt
783:deciwatt
732:Multiples
611:) is the
599:Ω
571:Ω
567:⋅
544:Ω
500:Ohm's law
472:⋅
390:−
381:⋅
366:⋅
333:⋅
193:(symbol:
151:CGS units
103:1 W
3320:Category
3275:See also
3048:kilogram
3017:SI units
2930: ·
2862:27 March
2856:Archived
2796:archived
2775:(2006),
2759:Archived
2709:Archived
2678:nasa.gov
2611:Archived
2588:archived
2567:archived
2539:Archived
2451:(2020).
2390:Archived
2316:, p.153
2281:Archived
2241:Archived
2221:archived
2141:(1911).
1987:archived
1966:(2006),
1864:Iwafune.
1838:= 100 kg
1730:See also
1587:circuits
1491:(MWt, MW
1408:Petawatt
1384:Terawatt
1364:Gigawatt
1339:(506:2).
1331:megawatt
1261:Megawatt
1205:Kilowatt
1141:Nanowatt
1121:Picowatt
1111:decibels
1099:FM tuner
1069:Attowatt
972:exawatt
951:petawatt
923:terawatt
910:picowatt
895:gigawatt
882:nanowatt
867:megawatt
839:kilowatt
722:absolute
710:absolute
623:Examples
266:velocity
260:Overview
234:inventor
231:Scottish
219:quantify
159:10
18:Kilowatt
3236:hectare
3221:decibel
3163:sievert
3158:siemens
3088:coulomb
3038:candela
2917: (
2888:minutes
2645:Bibcode
2545:19 June
2491:Bibcode
2179:9 April
2151:(ed.).
1656:with a
1550:= 270 W
1543:= 270 W
1531:). The
1463:In the
1336:Science
1301:. U.S.
1227:engines
1175:watches
630:gravity
429:of one
242:chemist
205:in the
139:⋅
135:⋅
3251:minute
3211:dalton
3153:radian
3148:pascal
3138:newton
3063:second
3043:kelvin
3033:ampere
2788:
2731:"Watt"
2680:. NASA
2643:(13).
2511:
2312:
2118:
2047:
2017:
1979:
1946:
1643:energy
1325:. The
766:Value
757:Value
674:Ampère
587:where
553:
526:
514:
465:
453:
423:ampere
356:
326:
304:
292:
274:newton
240:, and
215:second
105:in ...
80:Symbol
3266:tonne
3261:neper
3246:litre
3188:weber
3173:tesla
3128:lumen
3123:katal
3118:joule
3113:hertz
3108:henry
3098:farad
3053:metre
2799:(PDF)
2782:(PDF)
2341:(PDF)
2330:(PDF)
2284:(PDF)
2269:(PDF)
2147:. In
1990:(PDF)
1973:(PDF)
1916:(PDF)
1852:= 3 m
1721:joule
1639:power
1475:or MW
1394:Earth
1095:radar
1091:radio
1061:face
772:Name
763:Name
689:1 A ×
638:power
211:joule
199:power
74:power
3241:hour
3183:watt
3178:volt
3103:gray
3058:mole
2959:watt
2946:Watt
2864:2009
2786:ISBN
2686:2022
2547:2012
2509:ISSN
2349:2021
2310:ISBN
2292:2013
2249:2010
2181:2018
2116:ISBN
2045:ISBN
2015:ISBN
1977:ISBN
1944:ISBN
1847:and
1715:The
1641:and
1388:The
1173:and
1093:and
1059:bold
789:daW
670:watt
431:volt
278:work
213:per
191:watt
189:The
53:watt
3216:day
3143:ohm
3133:lux
2653:doi
2499:doi
2431:IET
1920:doi
1831:mgh
1662:100
1660:of
1527:(GW
1487:or
1473:MWe
1422:'s
1327:OED
1317:OED
1269:or
1199:dBm
1079:μPa
1049:QW
1040:qW
1029:RW
1020:rW
1009:YW
1000:yW
989:ZW
980:zW
969:EW
960:aW
809:hW
800:cW
780:dW
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1467:,
1440:ps
1432:ps
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946:PW
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877:nW
862:MW
849:μW
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821:mW
619:.
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133:kg
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