Rukunan ma'auni sune kayan aikin da ake amfani da su don ƙididdige abubuwa daban -daban, gwargwadon yadda lambobi a cikin su kawai ke ba da damar ƙidaya waɗancan abubuwa masu rarrabuwa azaman raka'a. Ba duk abin da mutane suke niyyar aunawa za a iya raba shi ta raka'a ba, har ma ta ƙara yiwuwar ɓangarori: yana da mahimmanci a wasu lokuta don gabatarwa alamu daban -daban na aunawa.
Waɗannan raka'a suna daidaita ƙimar sikeli, kuma gaba ɗaya sun zama kalmomi ɗaya ko biyu da aka ambata a ƙarshen lambar. Sanin raka'a na auna ya sa ya yiwu mu fahimci wace irin raka'a ce da muke magana a kai. Koyaya, a cikin abin da ake auna girman akwai maganganu daban -daban, wanda ya sa ya zama dole tsarin juyawa, wanda wani lokacin iliminsa ke ƙuntata ga ƙwararrun masana kimiyya kan batun.
Shi ya sa, gwargwadon yawancin jama'a, ya zama al'ada don gabatar da raka'a ma'aunin a kowane yanki ɗaya, a cikin yanki ɗaya: a kowane hali, ninki -iri iri ɗaya, wanda bai ƙunshi biyu daban -daban ba (gram, milligrams, da kilo suna cikin ma'aunin ma'auni ɗaya). Lokacin da mutumin da bai san abubuwa da yawa game da raka'a ma'aunai ya yi tafiya zuwa wani wuri ba, yana da yawa a gare shi ya sami rudani a cikin adadin adadi.
Duk da haka, an amince da gabatar da wani tsarin raka'a na duniya don duniya ta sami hanya ta musamman don auna wasu adadi. An yarda, don haka, a zana jerin raka'a bakwai na auna: ɗaya don tsawon, ɗaya don taro, ɗaya don lokaci, ɗaya don ƙarfin wutar lantarki na yanzu, ɗaya don zafin zafin jiki, ɗaya don yawan abu da ɗaya don ƙarfin ƙarfi .
Misalai ashirin na raka'a na auna za a yi cikakken bayani a nan, suna nuna waɗanda ke cikin tsarin raka'a na duniya. Ga sauran kararrakin, za a ambaci dangantakar da aka kafa da ta ƙasa da ƙasa.
- Jirgin karkashin kasa (ma'aunin tsayi, tsarin raka'a na duniya)
- Inch (ma'aunin tsayi, inda mita ɗaya yayi daidai da inci 39.37)
- Yard (ma'aunin tsawon, inda mita ɗaya yayi daidai da yadi 1.0936)
- Kafa (ma'aunin tsayin, inda mita ɗaya yake kusan ƙafa 3.2708)
- Mile (ma'aunin tsayin, inda mita ɗaya yake mil mil 0.00062)
- Kilogram (ma'aunin taro, tsarin raka'a na duniya)
- Libra (ma'aunin taro, inda kilo yake kilo 2.20462)
- Dutse (ma'aunin taro, tare da kilo 1 daidai da dutse 0.157473)
- Ounce (ma'aunin taro, inda kilo shine 35.274 ozaji)
- Na biyu (ma'aunin lokaci, tsarin sassan duniya)
- Lita (ma'aunin ƙarar, yawanci ana amfani dashi)
- Digiri na digiri (ma'aunin kusurwa)
- Radian (ma'aunin kusurwa, inda 1 centesimal degree shine 0.015708 radians)
- Galan Amurka (ma'aunin girma, daidai yake da lita 3.78541)
- Amp (ma'auni na yanzu, tsarin raka'a na duniya)
- Kelvin (ma'aunin zafin jiki na thermodynamic, tsarin raka'a na duniya)
- Digiri na Celsius (ma'aunin zafin jiki, wanda aka ƙaddara ta ragin Kelvin - 273.15)
- Digiri na Fahrenheit (ma'aunin zafin jiki, wanda aka kiyasta ta aikin [(Kelvin - 273.15) * 1.8] + 32)
- Mol (ma'aunin adadin abu, tsarin raka'a na duniya)
- Kyandir (ma'aunin ƙarfin haske, tsarin raka'a na duniya)
