2149:
614:
590:) in 1960, replacing the previous name for the unit, "cycles per second" (cps), along with its related multiples, primarily "kilocycles per second" (kc/s) and "megacycles per second" (Mc/s), and occasionally "kilomegacycles per second" (kMc/s). The term "cycles per second" was largely replaced by "hertz" by the 1970s.
1155:
provides prefixes for are believed to occur naturally in the frequencies of the quantum-mechanical vibrations of massive particles, although these are not directly observable and must be inferred through other phenomena. By convention, these are typically not expressed in hertz, but in terms of the
797:, which is an electrical voltage that switches between low and high logic levels at regular intervals. As the hertz has become the primary unit of measurement accepted by the general populace to determine the performance of a CPU, many experts have criticized this approach, which they claim is an
64:
1176:
contains characters for common SI units for frequency. These are intended for compatibility with East Asian character encodings, and not for use in new documents (which would be expected to use Latin letters, e.g. "MHz").
801:. Some processors use multiple clock cycles to perform a single operation, while others can perform multiple operations in a single cycle. For personal computers, CPU clock speeds have ranged from approximately
734:) of terahertz. Electromagnetic radiation with frequencies in the low terahertz range (intermediate between those of the highest normally usable radio frequencies and long-wave infrared light) is often called
433:
and radioactivity all have the dimension T, of these only frequency is expressed using the unit hertz. Thus a disc rotating at 60 revolutions per minute (rpm) is said to have an angular velocity of 2
742:, which can be measured in exahertz (EHz). (For historical reasons, the frequencies of light and higher frequency electromagnetic radiation are more commonly specified in terms of their
531:
490:
1364:
Although hertz is often said to imply cycle per second (cps), the SI explicitly states that "cycle" and "cps" are not units in the SI, likely due to ambiguity in the terms.
289:
1611:
Pellam, J. R.; Galt, J. K. (1946). "Ultrasonic
Propagation in Liquids: I. Application of Pulse Technique to Velocity and Absorption Measurements at 15 Megacycles".
1686:
1486:
1457:
373:
means "one hundred periodic events occur per second", and so on. The unit may be applied to any periodic eventâfor example, a clock might be said to tick at
2124:
1783:
593:
In some usage, the "per second" was omitted, so that "megacycles" (Mc) was used as an abbreviation of "megacycles per second" (that is, megahertz (MHz)).
1373:"(d) The hertz is used only for periodic phenomena, and the becquerel (Bq) is used only for stochastic processes in activity referred to a radionuclide."
583:
579:
1315:
1657:
719:
is often described by its frequencyâthe number of oscillations of the perpendicular electric and magnetic fields per secondâexpressed in hertz.
369:). One hertz (i.e. one per second) simply means "one periodic event occurs per second" (where the event being counted may be a complete cycle);
1801:
1325:
1792:
1590:
602:
1840:
2030:
1545:
1320:
849:
2134:
767:
Further information on why the frequency, including for gigahertz (GHz) etc., is a flawed speed indicator for computers:
128:
1849:
1295:
1152:
541:
309:-133 atom" and then adds: "It follows that the hyperfine splitting in the ground state of the caesium 133 atom is exactly
195:
1563:
346:." The dimension of the unit hertz is 1/time (T). Expressed in base SI units, the unit is the reciprocal second (1/s).
2178:
305:
periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the
1690:
46:
249:
at which computers and other electronics are driven. The units are sometimes also used as a representation of the
2173:
822:
716:
495:
2088:
1777:
1520:
755:
89:; that is, at 0.5, 1.0 and 2.0 flashes per second, respectively. The time between each flash â the
2183:
2129:
837:
810:
774:
1833:
110:
35:
1661:
726:
is electromagnetic radiation that is even higher in frequency, and has frequencies in the range of tens (
31:
722:
Radio frequency radiation is usually measured in kilohertz (kHz), megahertz (MHz), or gigahertz (GHz).
1480:"SI Brochure: The International System of Units (SI) § Appendix 1. Decisions of the CGPM and the CIPM"
1620:
1421:
438:
223:
656:
corresponds to a particular frequency. An infant's ear is able to perceive frequencies ranging from
463:
2114:
1290:
735:
693:
389:
42:
1772:
1738:
1340:
556:
becomes capitalised at the beginning of a sentence and in titles but is otherwise in lower case.
2152:
2038:
1826:
1335:
1330:
1310:
1169:
637:
430:
398:
234:
1810:
1636:
1628:
1300:
575:
565:
426:
199:
1713:
624:
periodic phenomenon that may be analyzed in terms of frequency. Two cycles are illustrated.
422:(also one per second) specifically refers to one radionuclide event per second on average.
1905:
1787:
1382:
1157:
829:
814:
697:
277:
254:
207:
1624:
2058:
1990:
833:
798:
768:
571:
537:
219:
215:
174:
161:
2167:
2119:
2043:
1980:
1970:
1549:
1345:
649:
617:
407:
350:
250:
227:
1479:
1450:
548:
letter (Hz), but when written in full, it follows the rules for capitalisation of a
2063:
2020:
2005:
1960:
1940:
1857:
790:
653:
238:
211:
169:
418:(one per second) specifically refers to one cycle (or periodic event) per second,
63:
1935:
1890:
1507:
794:
731:
641:
549:
246:
1742:
1156:
equivalent energy, which is proportional to the frequency by the factor of the
1508:
NIST Guide to SI Units â 9 Rules and Style
Conventions for Spelling Unit Names
778:
743:
689:
685:
613:
545:
393:
378:
349:
In
English, "hertz" is also used as the plural form. As an SI unit, Hz can be
222:(1857â1894), the first person to provide conclusive proof of the existence of
2000:
1915:
1567:
753:: for a more detailed treatment of this and the above frequency ranges, see
739:
621:
606:
601:
411:
191:
143:
69:
1880:
727:
645:
574:(1857â1894), who made important scientific contributions to the study of
17:
1451:"SI Brochure: The International System of Units (SI) § 2.3.1 Base units"
30:
This article is about the unit measure. For the car rental company, see
2068:
2053:
1995:
1925:
1920:
1870:
1641:
1173:
454:
306:
1632:
230:: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz).
2083:
1985:
1895:
1875:
1865:
750:
747:
203:
1743:"The Unicode Standard 12.0 â CJK Compatibility â° Range: 3300â33FF â±"
218:. It is used only in the case of periodic events. It is named after
1422:"SI Brochure: The International System of Units (SI) â 9th edition"
2098:
2093:
2078:
1955:
1950:
1930:
1885:
1305:
806:
789:). This specification refers to the frequency of the CPU's master
723:
705:
701:
669:
633:
612:
600:
245:- and audio-related applications. It is also used to describe the
242:
2073:
2015:
2010:
1524:
288:
The hertz is defined as one per second for periodic events. The
1822:
2048:
1975:
1965:
840:, also operate at various frequencies in the megahertz range.
233:
Some of the unit's most common uses are in the description of
1818:
198:(SI), often described as being equivalent to one event (or
133:
226:. For high frequencies, the unit is commonly expressed in
1589:
Cartwright, Rufus (March 1967). Beason, Robert G. (ed.).
1795:
Optical frequency standard based on a single trapped ion
41:"Hz" and "Megahertz" redirect here. For other uses, see
1687:"Black Hole Sound Waves â Science Mission Directorate"
1200:
214:
is s, meaning that one hertz is one per second or the
117: ); that is, 2, 1 and 0.5 seconds, respectively.
498:
466:
1406:
American
Heritage Dictionary of the English Language
2107:
2029:
1904:
1856:
1681:
1679:
544:unit named for a person, its symbol starts with an
167:
157:
149:
139:
127:
122:
56:
648:. Humans perceive the frequency of a sound as its
525:
484:
406:(1/s or s) in general or, in the specific case of
738:. Even higher frequencies exist, such as that of
1510:, National Institute of Standards and Technology
1485:(in British English and French) (9th ed.).
1456:(in British English and French) (9th ed.).
290:International Committee for Weights and Measures
1416:
1414:
1385:are typically on the order of tens of terahertz
1660:. Mmk.e-technik.tu-muenchen.de. Archived from
1194:
570:The hertz is named after the German physicist
353:; commonly used multiples are kHz (kilohertz,
1834:
8:
1600:. Fawcett Publications, Inc. pp. 98â99.
449:with the unit hertz and an angular velocity
2125:Historical definitions of the SI base units
526:{\displaystyle f={\frac {\omega }{2\pi }}.}
1841:
1827:
1819:
584:General Conference on Weights and Measures
62:
53:
1640:
1546:"SI brochure, Section 2.2.2, paragraph 6"
580:International Electrotechnical Commission
505:
497:
465:
445:. The correspondence between a frequency
1813:Time and frequency Optical atomic clocks
1316:Normalized frequency (signal processing)
854:
588:Conférence générale des poids et mesures
1397:
1357:
848:For examples of various multiples, see
292:defined the second as "the duration of
1326:Orders of magnitude (rotational speed)
692:and other physical vibrations such as
1802:National Research Council of Canada:
1793:National Research Council of Canada:
1778:National Research Council of Canada:
863:
860:
582:(IEC) in 1935. It was adopted by the
7:
1591:"Will Success Spoil Heinrich Hertz?"
1408:(3rd ed.), Boston: Houghton Mifflin.
777:(CPU) are labeled in terms of their
377:, or a human heart might be said to
210:whose formal expression in terms of
1656:Ernst Terhardt (20 February 2000).
1145:Common prefixed units are in bold.
1773:SI Brochure: Unit of time (second)
578:. The name was established by the
68:Top to bottom: Lights flashing at
25:
1712:Asaravala, Amit (30 March 2004).
1689:. science.nasa.go. Archived from
2148:
2147:
1613:The Journal of Chemical Physics
1321:Orders of magnitude (frequency)
850:Orders of magnitude (frequency)
2135:System of units of measurement
1811:National Physical Laboratory:
485:{\displaystyle \omega =2\pi f}
1:
1296:Bandwidth (signal processing)
1153:International System of Units
793:. This signal is nominally a
241:, particularly those used in
196:International System of Units
1151:Higher frequencies than the
799:easily manipulable benchmark
1798:(archived 23 December 2013)
1201:
856:SI multiples of hertz (Hz)
2200:
1714:"Good Riddance, Gigahertz"
1658:"Dominant spectral region"
847:
766:
563:
47:Megahertz (disambiguation)
40:
29:
2143:
1195:
1144:
883:
880:
877:
874:
871:
868:
823:IBM Power microprocessors
717:Electromagnetic radiation
712:Electromagnetic radiation
536:The hertz is named after
61:
2089:minute and second of arc
1566:. Iec.ch. Archived from
781:expressed in megahertz (
775:central processing units
756:Electromagnetic spectrum
672:can hear sounds between
268:is the photon's energy,
216:reciprocal of one second
2130:2019 revision of the SI
1807:(archived 27 June 2013)
1786:5 December 2021 at the
1598:Electronics Illustrated
836:connecting the CPU and
620:is an example of a non-
425:Even though frequency,
396:events is expressed in
1804:Optical frequency comb
625:
610:
609:with varying frequency
527:
486:
365:) and THz (terahertz,
272:is its frequency, and
36:Hertz (disambiguation)
34:. For other uses, see
1780:Cesium fountain clock
616:
604:
564:Further information:
528:
487:
439:frequency of rotation
224:electromagnetic waves
220:Heinrich Rudolf Hertz
32:Hertz Global Holdings
27:SI unit for frequency
2031:Other accepted units
496:
464:
97: â is given by
2115:Conversion of units
1625:1946JChPh..14..608P
1489:. 2019. p. 169
1460:. 2019. p. 130
1291:Alternating current
857:
805:in the late 1970s (
773:In computers, most
736:terahertz radiation
700:extends from a few
629:Sound and vibration
361:), GHz (gigahertz,
357:), MHz (megahertz,
123:General information
43:Hz (disambiguation)
2179:Units of frequency
1908:with special names
1739:Unicode Consortium
1552:on 1 October 2009.
855:
708:range and beyond.
626:
611:
523:
482:
437: rad/s and a
251:energy of a photon
235:periodic waveforms
206:. The hertz is an
2161:
2160:
2039:astronomical unit
1633:10.1063/1.1724072
1404:"hertz". (1992).
1383:Atomic vibrations
1336:Radian per second
1331:Periodic function
1311:Frequency changer
1170:CJK Compatibility
1149:
1148:
698:atomic vibrations
638:longitudinal wave
518:
431:angular frequency
399:reciprocal second
390:rate of aperiodic
190:) is the unit of
180:
179:
16:(Redirected from
2191:
2174:SI derived units
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2150:
1843:
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1674:
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1671:
1669:
1664:on 26 April 2012
1653:
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1602:
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1548:. Archived from
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1533:
1531:
1521:"BIPM â Table 3"
1517:
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804:
788:
785:) or gigahertz (
784:
730:) to thousands (
683:
681:
675:
667:
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659:
576:electromagnetism
566:Cycle per second
540:. As with every
532:
530:
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491:
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427:angular velocity
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1788:Wayback Machine
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1619:(10): 608â614.
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1158:Planck constant
853:
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815:Apple computers
802:
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771:
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684:. The range of
679:
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636:is a traveling
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208:SI derived unit
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2184:Heinrich Hertz
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1926:degree Celsius
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1906:Derived units
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1570:on 19 May 2013
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842:
834:front-side bus
832:, such as the
830:computer buses
769:Megahertz myth
764:
761:
713:
710:
668:; the average
640:, which is an
630:
627:
598:
595:
572:Heinrich Hertz
561:
558:
538:Heinrich Hertz
534:
533:
522:
516:
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509:
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481:
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457:per second is
453:with the unit
404:inverse second
328:
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162:Heinrich Hertz
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2059:degree of arc
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1974:
1972:
1969:
1967:
1964:
1962:
1959:
1957:
1954:
1952:
1949:
1947:
1944:
1942:
1939:
1937:
1934:
1932:
1929:
1927:
1924:
1922:
1919:
1917:
1914:
1913:
1911:
1909:
1903:
1897:
1894:
1892:
1889:
1887:
1884:
1882:
1879:
1877:
1874:
1872:
1869:
1867:
1864:
1863:
1861:
1859:
1855:
1851:
1844:
1839:
1837:
1832:
1830:
1825:
1824:
1821:
1815:
1814:
1809:
1806:
1805:
1800:
1797:
1796:
1791:
1789:
1785:
1782:
1781:
1776:
1774:
1771:
1770:
1766:
1751:
1744:
1740:
1734:
1731:
1719:
1715:
1708:
1705:
1693:on 5 May 2021
1692:
1688:
1682:
1680:
1676:
1663:
1659:
1652:
1649:
1643:
1638:
1634:
1630:
1626:
1622:
1618:
1614:
1607:
1604:
1599:
1592:
1585:
1582:
1569:
1565:
1564:"IEC History"
1559:
1556:
1551:
1547:
1541:
1538:
1526:
1522:
1516:
1513:
1509:
1504:
1501:
1488:
1481:
1475:
1472:
1459:
1452:
1446:
1443:
1430:
1423:
1417:
1415:
1411:
1407:
1401:
1398:
1392:
1384:
1379:
1376:
1370:
1367:
1361:
1358:
1351:
1347:
1346:Sampling rate
1344:
1342:
1339:
1337:
1334:
1332:
1329:
1327:
1324:
1322:
1319:
1317:
1314:
1312:
1309:
1307:
1304:
1302:
1299:
1297:
1294:
1292:
1289:
1288:
1284:
1267:
1252:
1237:
1222:
1207:
1203:
1191:SQUARE HERUTU
1180:
1179:
1178:
1175:
1171:
1163:
1161:
1159:
1154:
1143:
1139:
1136:
1133:
1130:
1127:
1124:
1123:
1119:
1116:
1113:
1110:
1107:
1104:
1103:
1099:
1096:
1093:
1090:
1087:
1084:
1083:
1079:
1076:
1073:
1070:
1067:
1064:
1063:
1059:
1056:
1053:
1050:
1047:
1044:
1043:
1039:
1036:
1033:
1030:
1027:
1024:
1023:
1020:
1017:
1015:
1012:
1009:
1006:
1003:
1000:
999:
996:
993:
991:
988:
985:
982:
979:
976:
975:
972:
969:
967:
964:
961:
958:
955:
952:
951:
948:
945:
943:
940:
937:
934:
931:
928:
927:
923:
920:
917:
914:
911:
908:
907:
903:
900:
897:
894:
891:
888:
887:
867:
861:Submultiples
859:
851:
843:
841:
839:
835:
831:
826:
824:
816:
812:
808:
800:
796:
792:
780:
776:
770:
762:
760:
758:
757:
752:
749:
745:
741:
737:
733:
729:
725:
720:
718:
711:
709:
707:
703:
699:
695:
691:
687:
671:
655:
651:
647:
643:
639:
635:
628:
623:
619:
615:
608:
603:
596:
594:
591:
589:
585:
581:
577:
573:
567:
559:
557:
555:
551:
547:
543:
539:
520:
514:
511:
507:
502:
499:
479:
476:
473:
470:
467:
460:
459:
458:
456:
452:
448:
440:
432:
428:
423:
413:
409:
408:radioactivity
405:
401:
400:
395:
391:
386:
380:
352:
347:
327:
308:
291:
283:
281:
279:
275:
271:
267:
263:
260: =
259:
256:
252:
248:
244:
240:
239:musical tones
236:
231:
229:
225:
221:
217:
213:
212:SI base units
209:
205:
201:
197:
193:
189:
185:
176:
173:
171:
170:SI base units
166:
163:
160:
156:
152:
148:
145:
142:
138:
135:
132:
130:
126:
121:
116:
112:
106:
96:
92:
75:
71:
65:
60:
55:
52:
48:
44:
37:
33:
19:
2064:electronvolt
1945:
1812:
1803:
1794:
1779:
1753:. Retrieved
1749:
1733:
1721:. Retrieved
1717:
1707:
1695:. Retrieved
1691:the original
1666:. Retrieved
1662:the original
1651:
1616:
1612:
1606:
1597:
1584:
1572:. Retrieved
1568:the original
1558:
1550:the original
1540:
1528:. Retrieved
1515:
1503:
1491:. Retrieved
1474:
1462:. Retrieved
1445:
1433:. Retrieved
1428:
1405:
1400:
1378:
1369:
1360:
1167:
1150:
1140:quettahertz
1131:quectohertz
1018:
1013:
994:
989:
970:
965:
946:
941:
844:SI multiples
827:
791:clock signal
772:
754:
721:
715:
654:musical note
632:
597:Applications
592:
587:
569:
553:
535:
450:
446:
424:
403:
397:
387:
348:
325:
287:
273:
269:
265:
261:
257:
247:clock speeds
232:
187:
183:
181:
140:Unit of
114:
104:
94:
90:
73:
51:
1750:Unicode.org
1642:1721.1/5042
1134:10 Hz
1125:10 Hz
1120:ronnahertz
1114:10 Hz
1111:rontohertz
1105:10 Hz
1100:yottahertz
1094:10 Hz
1091:yoctohertz
1085:10 Hz
1080:zettahertz
1074:10 Hz
1071:zeptohertz
1065:10 Hz
1054:10 Hz
1045:10 Hz
1034:10 Hz
1031:femtohertz
1025:10 Hz
1010:10 Hz
1001:10 Hz
986:10 Hz
977:10 Hz
962:10 Hz
959:microhertz
953:10 Hz
938:10 Hz
935:millihertz
929:10 Hz
924:hectohertz
918:10 Hz
915:centihertz
909:10 Hz
898:10 Hz
889:10 Hz
838:northbridge
817:) to up to
795:square wave
744:wavelengths
732:ultraviolet
670:adult human
642:oscillation
618:A heartbeat
550:common noun
383:1.2 Hz
371:100 Hz
321: hertz
158:Named after
129:Unit system
87:2.0 Hz
83:1.0 Hz
78:0.5 Hz
70:frequencies
2168:Categories
1858:Base units
1530:24 October
1493:2 February
1464:2 February
1393:References
1278:SQUARE THZ
1263:SQUARE GHZ
1248:SQUARE MHZ
1233:SQUARE KHZ
1051:attohertz
1040:petahertz
1007:picohertz
983:nanohertz
904:decahertz
895:decihertz
881:SI symbol
872:SI symbol
864:Multiples
819:6 GHz
803:1 MHz
779:clock rate
740:gamma rays
702:femtohertz
690:infrasound
686:ultrasound
674:20 Hz
658:20 Hz
622:sinusoidal
546:upper case
414:. Whereas
412:becquerels
394:stochastic
367:10 Hz
363:10 Hz
359:10 Hz
355:10 Hz
284:Definition
253:, via the
111:reciprocal
2001:steradian
1916:becquerel
1574:6 January
1218:SQUARE HZ
1172:block in
1060:exahertz
1019:terahertz
995:gigahertz
971:megahertz
947:kilohertz
811:Commodore
763:Computers
706:terahertz
704:into the
694:molecular
607:sine wave
515:π
508:ω
477:π
468:ω
443:1 Hz
420:1 Bq
416:1 Hz
375:1 Hz
228:multiples
192:frequency
186:(symbol:
144:frequency
18:Kilohertz
2153:Category
2108:See also
1881:kilogram
1850:SI units
1784:Archived
1741:(2019).
1723:28 April
1668:28 April
1435:7 August
1285:See also
1275:㎔
1260:㎓
1245:㎒
1230:㎑
1215:㎐
1188:㌹
828:Various
751:energies
728:infrared
682: Hz
666: Hz
646:pressure
586:(CGPM) (
552:; i.e.,
351:prefixed
343: Hz
264:, where
2069:hectare
2054:decibel
1996:sievert
1991:siemens
1921:coulomb
1871:candela
1697:12 July
1621:Bibcode
1202:herutsu
1174:Unicode
1164:Unicode
652:. Each
560:History
455:radians
307:caesium
276:is the
194:in the
102:⁄
2084:minute
2044:dalton
1986:radian
1981:pascal
1971:newton
1896:second
1876:kelvin
1866:ampere
1755:24 May
1272:
1270:U+3394
1257:
1255:U+3393
1242:
1240:U+3392
1227:
1225:U+3391
1212:
1210:U+3390
1185:
1183:U+3339
878:Value
869:Value
748:photon
329:hfs Cs
204:second
202:) per
150:Symbol
93:
91:period
2099:tonne
2094:neper
2079:litre
2021:weber
2006:tesla
1961:lumen
1956:katal
1951:joule
1946:hertz
1941:henry
1931:farad
1886:metre
1746:(PDF)
1718:Wired
1594:(PDF)
1483:(PDF)
1454:(PDF)
1425:(PDF)
1352:Notes
1306:FLOPS
1280:(THz)
1265:(GHz)
1250:(MHz)
1235:(kHz)
901:daHz
884:Name
875:Name
807:Atari
724:Light
650:pitch
634:Sound
554:hertz
410:, in
243:radio
200:cycle
184:hertz
109:(the
57:hertz
2074:hour
2016:watt
2011:volt
1936:gray
1891:mole
1757:2019
1725:2012
1699:2017
1670:2012
1576:2021
1532:2012
1525:BIPM
1495:2021
1487:BIPM
1466:2021
1458:BIPM
1437:2022
1431:: 26
1429:BIPM
1341:Rate
1220:(Hz)
1168:The
1137:QHz
1128:qHz
1117:RHz
1108:rHz
1097:YHz
1088:yHz
1077:ZHz
1068:zHz
1057:EHz
1048:aHz
1037:PHz
1028:fHz
1004:pHz
980:nHz
956:ÎŒHz
932:mHz
921:hHz
912:cHz
892:dHz
696:and
676:and
492:and
379:beat
237:and
182:The
85:and
45:and
2049:day
1976:ohm
1966:lux
1637:hdl
1629:doi
1196:ăă«ă
1014:THz
990:GHz
966:MHz
942:kHz
821:in
787:GHz
783:MHz
759:.)
746:or
680:000
664:000
660:to
644:of
441:of
402:or
392:or
381:at
341:770
338:631
335:192
319:770
316:631
313:192
302:770
299:631
296:192
168:In
113:of
2170::
1748:.
1716:.
1678:^
1635:.
1627:.
1617:14
1615:.
1596:.
1523:.
1427:.
1413:^
1199:,
1160:.
825:.
813:,
809:,
688:,
678:16
662:20
605:A
542:SI
429:,
385:.
331:=
323:,
280:.
262:hΜ
188:Hz
153:Hz
134:SI
81:,
76:=
1842:e
1835:t
1828:v
1759:.
1727:.
1701:.
1672:.
1645:.
1639::
1631::
1623::
1578:.
1534:.
1497:.
1468:.
1439:.
1205:)
1193:(
852:.
521:.
512:2
503:=
500:f
480:f
474:2
471:=
451:Ï
447:f
435:Ï
333:9
326:Μ
311:9
294:9
274:h
270:Μ
266:E
258:E
175:s
115:f
105:f
100:1
95:T
74:f
49:.
38:.
20:)
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