Tsanangudzo yemayuniti epasi rose
Sisitimu yeZvikamu
Semuenzaniso, kana ukayera hurefu hwako wohuti 100, mhedzisiro yacho haina zvainoreva. Saizvozvowo, kana ukayera huremu hwemuviri wako wohuti 20, mhedzisiro yacho haina zvainoreva uye hainzwisisiki kune vamwe. Kunze kwekutaura nhamba chaiyo kana chifananidzo, chiyero chinofanirawo kuperekedzwa nemayuniti. Kana ukati hurefu hwako mafathomu maviri, saka 2 inhamba yekuyera uye mafathomu ndiwo mauniti aunoshandisa. Vanhu vakajaira kushandisa mafathomu vanonzwisisa chiyero ichi. Kana, kana ukayera hurefu hwetafura yaunoshandisa mukirasi wohuti 5 spans, mhedzisiro yacho inonzwisisika kune vamwe vakashandisa spans seyuniti.
Kune mhando dzakawanda dzemayuniti anoshandiswa pasi rose, zvichienderana netsika dzemuno. Semuenzaniso, yuniti yehurefu yaimboshandiswa muEngland yaive yadhi, kana yuniti yehurefu yaimboshandiswa muFrance yaive tsoka, kana yuniti yehurefu yaimboshandiswa muIjipita yekare yaive kubiti. Kana wakajaira kushandisa span kana fathom unit wobva waverenga chinyorwa chinotaura kuti gomo refu kupfuura mamwe ose pasi rose i10.000 yards, semuenzaniso, zvechokwadi uchavhiringidzika uye hauna mufananidzo wakajeka wehurefu hwegomo.
Tsanangudzo ye 1 span inhambwe iri pakati pemuromo wechigunwe chikuru nemuromo wechigunwe chekunongedza kana wakatambanudzwa. 1 fathom inhambwe iri pakati pemuromo wechigunwe chepakati nemuromo weruoko kana ruoko rwatambanudzwa. 1 yadhi inhambwe iri pakati pemuromo wechimhino chamambo weEngland (1120 AD) nemuromo wechioko chake chakatambanudzwa. 1 tsoka inhambwe yetsoka yaMambo Louis XIV, Mambo weFrance. 1 kubhiti inhambwe iri pakati pegokora reruoko nemuromo wechigunwe chepakati kana wakatambanudzwa. 1 span kana 1 fathom kana 1 yadhi kana 1 tsoka, muenzaniso weyuniti yekutanga yehurefu. Kana hurefu hwetafura = 5 span saka hurefu hwetafura hwakapetwa kashanu kupfuura hurefu hwemunhu anoiyera. Muchiitiko ichi, hurefu hwemunhu hunoshandiswa seyuniti yakajairika yekuyera hurefu.
Zvakakosha kunzwisisa kuti muviri wemunhu unokura, saka hupamhi, famith, cubiti, tsoka, kana yadhi zvinogona kuchinja. Saizvozvowo, kushandisa mayuniti akasiyana kunogona kukonzera kuvhiringidzika kune avo vasina kujaira. Kuti uwane zviyero zvakarurama uye zvakavimbika, huwandu hwakajairika hwehwaro hunodiwa husingachinji uye hunogona kudzokororwa kuitira kuti hugone kushandiswa pasi rose.
Sisitimu Yepasi Pose Yemayuniti
Sisitimu yemayuniti anoshandiswa nesainzi nemainjiniya pasi rese pakutanga yainzi metric system. Kubva muna 1960, yave ichinzi International System, kana kuti SI muchidimbu. Mayuniti eSI e mari huru inogona kuonekwa mutafura yehuwandu hwezvinhu zviri muhuwandu hwayo.
Chikamu huwandu hwakawanikwa inogona kuratidzwa muzvikamu zviviri kana kupfuura zvekuyera; semuenzaniso, chikamu chenzvimbo i m2, chikamu chekumhanya i m/s, chikamu chekuwanda i kg/m3, chikamu chekumhanyisa i m/s2, chikamu chesimba i kg m/s2, mayuniti ebasa nesimba ari kg m2/s2, chikamu chesimba i kg m2/s3.
Mamwe mayuniti anobva muhuwandu hwacho ane mayuniti akawanda anopiwa mazita akakosha; semuenzaniso, yuniti yesimba kg m/s2 inonzi Newton (N), chikamu chebasa nesimba kg m2/s2 inonzi Joule (J), chikamu chesimba kg m2/s3 anonzi Watt (W).
Chinotangira Chiyuniti
Tinogona kutsanangura mayuniti eSI seakakura kana madiki tichishandisa mayuniti ekutanga. Mayuniti ekutanga anowanzo verengerwa muzvikamu gumi zveyuniti yekutanga. Mayuniti ekutanga anowanzo wedzerwa kumayuniti eSI kuti pagadzirwe mayuniti matsva.
Mienzaniso yemayuniti ekutanga akawedzerwa kumayuniti ekutanga
Mienzaniso yema "unit prefixes" akawedzerwa kuma "derived units":
1 kW (kilowatt) = 103 W = 1000 W —> W = Watt (Chikamu chesimba)
1 MW (megawati) = 106 W = 1000.000 W —> W = Watt (Chikamu chesimba)
1 MV (megavolt) = 106 V = 1000.000 V —> V = Volt (Chikamu chevoltage yemagetsi)
1 nC (nanocoulomb) = 1 nC = 10-9 C —> C = Coulomb (Chikamu chesimba remagetsi)
1 kPa (kilopascal) = 103 Pa —> Pa = Pascal (Chikamu chekumanikidzwa)
1 GHz (gigahertz) = 109 Hz —> Hz = Hertz (Chikamu cheFrequency)
