Ngelixa iiyunithi zokulinganisa bubukhulu obumiselweyo ukumisela ubungakanani bezinto ezingenakulinganiswa ukusuka 'kubalo lweeyunithi ezizezinye', Iiyunithi ezifumanekayo zezo zithathwe kwiiyunithi zokulinganisa, kwaye zisetyenziselwa amanani athile ngakumbi.
Iyunithi yokulinganisa ubude (imitha), enye yobunzima (ikhilogram), enye yexesha (yesibini), enye yombane wamandla (ampere), enye yeqondo lobushushu (i-kelvin), enye yobungakanani bezinto ( i-mole), kunye nokubaluleka kokukhanya (candela). Ukusuka kwezi sixhenxe kunokwenzeka ukuba wenze indibaniselwano ephela ifikelela nakweyiphi na iiyunithi ezivela kuyo, eziyimfuneko kumlinganiso wenye iklasi yeziganeko. Nangona ayizizo iiyunithi zokuqala, zisabaluleke kakhulu kubuntu: Ngaphandle kweeyunithi ezithathiweyo, umlinganiso wamandla, amandla, uxinzelelo, amandla, isantya okanye ukukhawulezisa ngekhe kwenzeke.
Njengakwiiyunithi eziqhelekileyo zemilinganiselo, Iiyunithi ezifumanekayo zikwanika amandla okwenza uguquko phakathi kweentlobo ezahlukeneyo. Umzekelo, kuqhelekile ukuba iyunithi yokulinganisa 'iNewton' isetyenziselwe ukulinganisa ubukhulu bamandla, kodwa kukwakho neyunithi yomlinganiso 'uDina', phantsi kobudlelwane apho i-newton enye ilingana ne-100,000 dynes. Kwenzeka into efanayo ngomlinganiso wamandla, umsebenzi kunye nobushushu: iiJoules zisetyenziswa kwinqanaba lenzululwazi, kodwa iikhalori zisetyenziswa kubomi bemihla ngemihla. Ubudlelwane bunomgca, ngokude njengekhalori yi-4.181 joules.
Olu luhlu lulandelayo luqulathe imizekelo elishumi elinesihlanu yeeyunithi ezithathiweyo, zibonisa izinto eziza kumela, kunye nokudityaniswa kweeyunithi ezisisiseko zomlinganiso ezibamiselayo.
- Imitha ngomzuzwana (umlinganiso wesantya okanye isantya): Imitha / Okwesibini
- Imitha yeCubic (umlinganiso wevolumu): imitha3
- U-Pascal (umlinganiso woxinzelelo): Ikhilogram / (Imitha * Okwesibini2)
- UHenry (inductance measurement): (Ikhilogram * Ampere2 * Indlela engaphantsi2) / Isibini2
- Imitha ngomzuzwana ophindwe kabini (umlinganiso wokunyusa): Imitha / Okwesibini2
- UHertz (umlinganiso wokuhamba rhoqo): 1 / Okwesibini
- Ipascal yesibini (ubungakanani besimo se-viscosity): Ikhilogram / (Imitha * yesibini)
- Ikhilogram imitha nganye (Ubungakanani bemilinganiselo): IKhilogram / iMitha3
- Isikwere semitha (umlinganiso wendawo): Imitha2
- Volt (umlinganiso wamandla ombane): (imitha2 Kilogram) / (Ampere Okwesibini3)
- Imitha yeNewton (umlinganiso womzuzu wamandla): (Imitha2 Kilogram) / Okwesibini2
- Joule ngokwe mitha nganye (Ubungakanani bamandla emilinganiselo): IKhilogram / (Imitha * Okwesibini2)
- Coulomb (umlinganiselo wentlawulo yombane): Ampere * * Okwesibini
- Imole ngekyuby mitha (Umlinganiso woxinaniso): I-Mol / Meter3
- Watt (umlinganiselo wamandla): (imitha2 Kilogram) / Okwesibini3
