Phetoho ea yuniti ke tsebo ea bohlokoa e hlokahalang masimong a fapaneng, ho tloha saenseng le boenjiniere ho ea bophelong ba letsatsi le letsatsi. Ho utloisisa mokhoa oa ho fetola yuniti ho re lumella ho buisana ka katleho le ho qoba liphoso tse ka bang kholo. Sengoloa sena se tla akaretsa likarolo tse fapaneng tsa phetoho ea yuniti, ho kenyeletsoa le lintho tsa motheo, mekhoa e sebelisitsoeng, le mathata a mohlala ho itloaetsa bokhoni bona.
Metheo ea Phetoho ea Yuniti
Diyuniti di sebediswa ho lekanya bongata bo fapaneng jwalo ka bolelele, boima, nako, mocheso, le tse ding. Sistimi e sebediswang haholo ya diyuniti ke Sistimi ya Matjhaba ya Diyuniti (SI), e kenyeletsang mithara (m) bakeng sa bolelele, kilogram (kg) bakeng sa boima, le ya bobedi (s) bakeng sa nako. Hape ho na le sistimi ya mmuso ya diyuniti, e atisang ho sebediswa dinaheng tse mmalwa, haholoholo United States.
Phetoho ea yuniti ke ts'ebetso ea ho fetola boleng ho tloha yuniti e 'ngoe ho ea ho e 'ngoe. Ts'ebetso ena e kenyelletsa ho sebelisa ntlha ea phetoho, e leng karolelano pakeng tsa li-unit tse peli tse fapaneng empa li lekana. Mohlala, inch e le 'ngoe e lekana le 2,54 cm, kahoo ntlha ea phetoho ho tloha lisenthimithara ho ea ho cm ke 2,54.
Mokhoa oa Phetoho ea Yuniti
1. Mokhoa oa Phetoho ea Lintlha
Mokhoa ona o kenyelletsa ho sebelisa likarolelano kapa lintlha tsa phetoho ho fetolela li-unit. Mohlala, ho fetolela lisenthimithara tse 10 ho isa ho lisenthimithara, re ka sebelisa ntlha ea phetoho ea 2,54 cm ka inch:
\[ 10 \, \text{inch} \times \frac{2,54 \, \text{cm}}{1 \, \text{inch}} = 25,4 \, \text{cm} \]
2. Mokhoa oa Tekanyo
Mokhoa ona o kenyelletsa ho sebelisa litekanyo tsa motheo (bolelele, boima, nako) ho netefatsa hore phetoho e etsoa ka nepo. Mohlala, ho fetola lebelo ho tloha km/h ho ea ho m/s ho kenyelletsa mehato e 'meli: ho fetola lik'hilomithara ho ea ho limithara le lihora ho ea ho metsotsoana:
\[ 1 \, \text{km/h} = \frac{1000 \, \text{m}}{3600 \, \text{s}} = \frac{5}{18} \, \text{m/s} \]
3. Mokhoa oa Tafole ea Phetoho
Litafole tsa phetoho li fana ka boleng ba lintlha tsa phetoho bakeng sa liyuniti tse fapaneng. Basebelisi ba batla feela boleng bo loketseng tafoleng ho etsa phetoho.
Mohlala oa Lipotso tsa Phetoho ea Yuniti
Mohlala oa 1: Phetoho ea Bolelele
Potso:
Fetola limithara tse 5 ho isa ho disentimitara.
Tharollo:
Sebelisa ntlha ea phetoho ea hore mithara e le 1 = lisenthimithara tse 100.
\[ 5 \, \text{meter} \times \frac{100 \, \text{cm}}{1 \, \text{meter}} = 500 \, \text{cm} \]
Kahoo, limithara tse 5 li lekana le lisenthimithara tse 500.
Mohlala oa 2: Phetoho ea Boima
Potso:
Fetola lik'hilograma tse 2 ho ligrama.
Tharollo:
Sebelisa ntlha ea phetoho e reng kilograma e le 1 = ligrama tse 1000.
\[ 2 \, \text{kg} \times \frac{1000 \, \text{gram}}{1 \, \text{kg}} = 2000 \, \text{gram} \]
Kahoo, lik'hilograma tse 2 li lekana le ligrama tse 2000.
Mohlala oa 3: Phetoho ea Nako
Potso:
Fetola lihora tse 3 ho ba metsotsoana.
Tharollo:
Sebelisa ntlha ea phetoho ea hore hora e le 'ngoe = metsotsoana e 3600.
\[ 3 \, \text{hours} \times \frac{3600 \, \text{seconds}}{1 \, \text{hours}} = 10800 \, \text{seconds} \]
Kahoo, lihora tse 3 li lekana le metsotsoana e 10800.
Mohlala oa 4: Phetoho ea Lebelo
Potso:
Fetola 60 km/h ho ba m/s.
Tharollo:
Sebelisa ntlha e tsebahalang ea phetoho: 1 km/h = 5/18 m/s.
\[ 60 \, \text{km/h} \times \frac{5}{18} \, \text{m/s} = \frac{300}{18} \, \text{m/s} = 16,67 \, \text{m/s} \]
Kahoo, 60 km/h e lekana le 16,67 m/s.
Mohlala oa 5: Phetoho ea Molumo
Potso:
Fetola lilithara tse 3 ho ba dimililithara.
Tharollo:
Sebelisa ntlha ea phetoho e reng litara e le 1 = mililithara tse 1000.
\[ 3 \, \text{liter} \times \frac{1000 \, \text{ml}}{1 \, \text{liter}} = 3000 \, \text{ml} \]
Kahoo, lilithara tse 3 li lekana le limililithara tse 3000.
Mohlala oa 6: Phetoho ea Mocheso
Potso:
Fetola likhato tse 100 tsa Celsius ho Fahrenheit.
Tharollo:
Sebelisa foromo ea phetoho ea mocheso ho tloha ho Celsius ho ea ho Fahrenheit:
\[ F = \left( \frac{9}{5} \times C \right) + 32 \]
Kenya boleng sebakeng sa bona:
\[ F = \left( \frac{9}{5} \makgetlo a 100 \left) + 32 = 180 + 32 = 212 \]
Kahoo, likhato tse 100 tsa Celsius li lekana le likhato tse 212 tsa Fahrenheit.
Mohlala oa 7: Phetoho ea Matla
Potso:
Fetola li-joule tse 5000 ho ba lik'hilocalories.
Tharollo:
Sebelisa ntlha ea phetoho e reng 1 joule = 0,000239006 kilocalories.
\[ 5000 \, \text{joule} \times 0,000239006 \, \text{kcal/joule} = 1,19503 \, \text{kcal} \]
Kahoo, li-joule tse 5000 li lekana le li-kilocalories tse 1,19503.
Qetello
Phetoho ea yuniti ke tsebo ea motheo e bohlokoa saenseng, boenjiniere le bophelong ba letsatsi le letsatsi. Ho utloisisa mokhoa oa ho fetola yuniti ho re lumella ho buisana ka katleho, ho qoba liphoso le ho toloka lintlha ka nepo. Sengoloa sena se akarelitse metheo ea phetoho ea yuniti, mekhoa e fapaneng e sebelisoang, le ho fana ka mehlala ea mathata a ho itloaetsa bokhoni bona.
Ka ho utloisisa mehopolo le mekhoa ea phetoho ea liyuniti, re ka ba le kholiseho e eketsehileng ho rarolleng mathata a fapaneng a amang liyuniti, maemong a thuto le lits'ebetsong tsa letsatsi le letsatsi tse sebetsang. Bokhoni bona bo boetse bo thusa ho nts'etsapele monahano o tebileng le o sekasekang, e leng oa bohlokoa ho rarolleng mathata a rarahaneng.
