ࡱ> SURq7 $bjbjUU .7|7|Fl,Ta,2zDDDD###t+v+v+v+v+v+v+$- /Z+####+DD,#DDt+#t+v""Dn Wű""1,0a,", 0 0" Unitati de msura n sistemul internacional UnitateNumeSimbolDefinitie lungime metru m este lungimea egala cu 1650763,73 lungimi de unda in vid ale radiatiei care corespunde tranzitiei intre nivelele 2p10 si 2d5 ale atomului de kripton 86 mas kilogram kgeste masa "kilogramului prototip international", adoptat ca unitate de masura a masei de Conferinta Generala de Masuri si Greutati din 1889 timp secund seste durata a 9192631770 perioade ale radiatiei corespunzatoare tranzitiei intre cele doua nivele hiperfine ale starii fundamentale a atomului de cesiu 113 curent electric amper Aeste intensitatea unui curent electric constant, care mentinut in doua conductoare paralele, rectilinii, de lungime infinita si sectiune neglijabila, asezate in vid, la o distanta de 1 m unul de celalalt, ar produce intre acestea, pe o lungime de 1 metru, o forta egala cu 210-7 newtonitemperatura termodinamickelvinKeste fractiunea 1/273,16 din temperatura termodinamica a punctului triplu al apei Intensitatea luminoas candela cdeste intensitatea luminoasa, intr-o directie data, a unei surse care emite o radiatie monocromatica cu frecventa de 5401012 hertzi si a carei intensitate energetica in aceasta directie este de 1/683 wati/sterradian UnitateNumeSimbolDefinitieariametru ptratmprodusul dintre lungine si latime (L"l)volummetru cubmprodusul dintre arie si inaltime (L"l"h) vitez metru pe secund m/s1m/s reprezinta viteza unui mobil care parcurge , in miscare uniforma , o distanta de 1 m, in timp de 1 s. acceleracie metru pe secund la ptrat m/s1m/s reprezinta acceleratia unui mobil care-si variaza viteza cu 1m/sin timp de 1 s.densitatea maseikilogram pe metru cubKg/mvolum specificmetru cub pe kilogramm/kgdensitatea curentuluiamper pe metru ptratA/mputerea cmpului magneticamper pe metruA/mconcentratieconcentratiemol/m3 Cantitate derivat Nume Simbol  Expresie  Definitie unghi plan radian rad m m-1 = 1este unghiul plan cu vrful in centrul unui cerc care delimiteaza pe circumferinta cercului un arc a carui lungime este egala cu raza cercului unghi solid steradian sr m2 m-2 = 1este unghiul solid cu vrful in centrul unei sfere, care delimiteaza pe suprafata sferei o arie egala cu aria unui patrat a carui latura este egala cu raza sfereifrecvencahertzHzs-1 forca newton N m kg s-21 Newton reprezinta forta care actioneaza asupra unui corp cu masa de 1 Kg si ii imprima o acceleratie de 1m/spresiunepascalPam-1 kg s-2cantitate de calduraJouleJm2 kg s-2puterewattWm2 kg s-31 Watt reperzinta puterea unei masini care efectueaza un lucru mechanic de 1J in timp de 1scantitate de electricitate coulomb C s A1 Coulomb reprezinta sarcina transportata de un current de 1A,printr-o sectiune transversala a unui conductor in timp de 1s.diferenta de potential electric volt V m2 kg s-3 A-11Volt reprezinta tensiunea electrica intre doua puncte situate la distanta de 1 m unul de altul ,pe acelasi linie de camp, intr-un camp electric uniform cu intensitatea de 1V/mcapacitatefaradFm-2 kg-1 s4 A3rezistenta electrica ohm  m2 kg s-2 A-11Ohm reprezinta rezistenta unui conductor strabatut de un current constant cu o intensitate de 1A, daca la capetele conductorului se aplica o tensiune de 1V..conductia electricasiemensSm-2 kg-1 s3 A2 flux magnetic weber Wb m2 kg s-2 A-1Weberul reprezinta fluxul magnetic prin a carui scadere uniforma pana la zero in timp de 1s se induce in circuitul electric inchis strabatut de acel flux magnetic cu un current de 1V. densitatea fluxului magnetic tesla T kg s-2 A-11Tesla reprezinta inductia magnetica a unui camp magnetic uniform care actioneaza cu o forta de 1 N asupra unui conductor cu lungimea de 1 m asezat perpendicular pe liniile campului daca acesta este parcurs de un current de 1A.inductiehenryHM2 kg s-2 A-2 temperatura Celsius degree Celsius C1grad Celsius reperezinta a 100 parte din intervalul cuprins intre punctual de inghetare al apei (0C) si punctual de fierbere al apei (100C) ,la presiune normalaflux luminos lumen lm cd sr1 lumen reprezinta fluxul luminos emis intr-un unghi solid egal cu 1 sr de catre un izvor punctiform avand intensitatea luminoasa 1 cd. iluminarea lux lx m-2 cd srreprezinta iluminarea unei suprafete de 1m ,care primeste un flux luminos de 1 lm, uniform repartizat pe aceasta suprafata. Cantitate derivataNumeSimbolvascozitatea dinamicapascal*secundaPa smomentul forteinewton*metruN mviteza ungiulararadian pe secundarad/sacceleratia ungiulararadian pe secunda la patratrad/s2entropiajoule pe kelvinJ/Kentropia specificajoule pe kilogram*kelvinJ/(kg K)energia specificajoule pe kilogramJ/kgconductivitatea termicawatt pe metru kelvin W/(m K)densitatea energieijoule pe metru cubJ/m3puterea campului electricvolt pe metroV/m densitate fluxului electriccoulunb pe metru patratC/m2peritivitateafarad pe metruF/m energia molarajoule pe molJ/mol entripia molarajoule pe mole*kelvinJ/(mol K) doza ratei de absortiegary pesecundaGy/sintensitatea radiatieiwatt pe steradianW/srradiatiawatt pe metru patrat*steradianW/(m2 sr) Prefixe pentru formarea multiplilor si submultiplilor unitatilor de masura Tera (T) = 10 = 1 000 000 000 000 Giga (g) =  EMBED Equation.3  = 1 000 000 000 Mega (M) =  EMBED Equation.3  = 1 000 000 Kilo (k) =  EMBED Equation.3  = 1 000 Hecto (h) =  EMBED Equation.3  = 100 Deca (da)= 10 = 10 Deci (d) = 10 EMBED Equation.3 = 0.1 Centi (c)= EMBED Equation.3 =0.01 Mili (m)= EMBED Equation.3 =0.001 Micro ()= EMBED Equation.3 =0.000001 Nano (n)= EMBED Equation.3 =0.000000001 Pico (p)= EMBED Equation.3 =0.000000000001 Femto(f)= EMBED Equation.3 =0.000000000000001 Z^` 8:^KLm F < 4 ^ *,lBDPR np LN`bvx.248<DFH* B*H*ph B*phCJaJCJaJ5 5CJaJ5>*CJ aJ UZ\^`pz $$Ifa$$a$ $_YYYYYYY_Y$If$$IfTl\< *$ 8Z t0$644 la  8:<FHY$$IfTl\< *$ 8Z t0$644 la$If HXZ^KLMNO_`Y$$IfTl\< *$ 8Z t0$644 la$If `abhijkm 4 Y$$IfTl\< *$ 8Z t0$644 la$If 4 B F  " 2 Y$$IfTl\< *$ 8Z t0$644 la$If 2 4 6 < YTRRR$a$$$IfTl\< *$ 8Z t0$644 la$If    2 4 > X ^ VPPPP$If$$IfTl\ ct$h g  t0$644 la $$Ifa$ *,.<>`_YYYY_0YYYY$If$$IfTl\ ct$h g  t0$644 la `dlBDF^`YKK`$If^``$$IfTl\ ct$h g  t0$644 la$IfPRtYY$$IfTl\ ct$h g  t0$644 la$If  6blnpYY$$IfTl\ ct$h g  t0$644 la$If YY$$IfTl\ ct$h g  t0$644 la$If BDNP`bvx$If $$Ifa$$a$ LFFFFFFF$If$$IfTlr _$f t0$644 la&(F0$$IfTlr _$f t0$644 la$If(.0FFd$$IfTlr _$f t0$644 la$IfF4$$IfTlr _$f t0$644 la$Iflmv}F$$IfTlr _$f t0$644 la$Ifiklm*+RVW |~   B*H*ph B*ph5B*CJaJph\F$$IfTlr _$f t0$644 la$If*+FLFFFFFLF$If$$IfTlr _$f t0$644 laFGOPRSWF$$IfTlr _$f t0$644 la$If|$If|~LFFFFF$If$$IfTlr _$f t0$644 laJ0DDDDDD$If$$IfTlur _$f t0$644 laF$$IfTlr _$f t0$644 la$IfLFFFFFFF$If$$IfTlr _$f t0$644 laFp$$IfTlr _$f t0$644 la$IfF$$IfTlr _$f t0$644 la$If"%'tu9^b .!1!2!2"3"4"="""""""""""##jC CJUVaJ jEHUjvC CJUVaJ jU5>* 5CJaJCJaJ5B*CJaJph B*ph B*H*phFF@$$IfTlr _$f t0$644 la$If"#&'F$$IfTlr _$f t0$644 la$Ift$IftuvLxFFFFFFF$If$$IfTlr _$f t0$644 laFAAAA$a$$$IfTlr _$f t0$644 la$If,189O^cdd^^^d$If$$IfTlF;  U l t0h6    44 la $$Ifa$$a$ dtlllx$$IfTlF;  U l t0h6    44 la$If     4 = > P b g h lll$$IfTlF;  U l t0h6    44 la$If h lll$$IfTlF;  U l t0h6    44 la$If !.!3!4!B!Q!V!W!f!s!z!{!lll$$IfTlF;  U l t0h6    44 la$If {!!!!!!!!!!"""lll$$IfTlF;  U l t0h6    44 la$If ""/"9":";"<"="""""ljjjjjje & F$$IfTlF;  U l t0h6    44 la$If ""#>#i#####%$R$$$$$$ & F#####2#3#4#5#K#L#_#`#a#b###################$$$$$$.$/$B$C$D$un jEHUjչC CJUVaJ j{EHUjC CJUVaJ jT EHUj~C CJUVaJ j- EHUjQC CJUVaJ jEHUjC CJUVaJ jEHUjvC CJUVaJ j EHUj%C CJUVaJ jU jEHU+D$E$[$\$o$p$q$r$$$$$$$$ jEHUjQC CJUVaJ jEHUjC CJUVaJ jU,1h/ =!"#$% Dd |@b  c $A? 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