Mayar da °F zuwa °R Fahrenheit ↔ Rankine Kyauta A kan layi Amintacce
Ku rubuta yanayin zafi a Fahrenheit ku karanta shi a Rankine nan take. Alaƙar daidai ce bisa ayyanawa, lissafin yana faruwa a cikin burauzarku, kuma ba a aika komai ko'ina ba.
Ba a ɗora komai ba
Ƙimomin da aka fi amfani da su — Mayar da °F zuwa °R (Fahrenheit ↔ Rankine)
| °F | °R |
|---|---|
| -40 | 419.67 |
| 0 | 459.67 |
| 32 | 491.67 |
| 50 | 509.67 |
| 68 | 527.67 |
| 77 | 536.67 |
| 98.6 | 558.27 |
| 212 | 671.67 |
Daga ina waɗannan ma'aunai suka fito
Fahrenheit ya kafa sifilinsa a 1724 a mafi sanyin abin da zai iya yi a kai a kai — ruwan gishiri na kankara, ruwa da gishiri — kuma ya sa zafin jiki kusa da 96, domin a iya raba ma'aunin nasa a sake rabawa sau da yawa. Celsius ya wallafa nasa a 1742 a juye, da 0 don tafasa da 100 don daskarewa; an juya shi bayan rasuwarsa, shi ya sa ake tunawa da shi saboda ma'aunin da bai taɓa amfani da shi ba. Kelvin shi kaɗai ne cikin huɗun da ya fara daga inda babu abin da ya rage da za a cire: cikakken sifili (absolute zero). Tun 2019 an bayyana shi ta hanyar tabbatar da Boltzmann constant, ba ta triple point na ruwa ba, don haka kelvin ba ya dogara da wani abu na musamman. Rankine shi ne digirin Fahrenheit da aka ƙirga daga cikakken sifili, kuma Réaumur, mai digiri 80 tsakanin daskarewa da tafasa, yana nan galibi a tsofaffin girke-girke da wasu wuraren sarrafa cuku.
Inda kuke haɗuwa da su
Celsius yana tafiyar da hasashen yanayi, girki da likitanci a kusan ko'ina; Fahrenheit yana yin aiki iri ɗaya a Amurka kuma yana da gindin zama a saitunan tanda da girke-girken Amurka. Kelvin na physics ne, na zafin launi na fitilu da allo, da duk abin da ya yi sanyi har lambobi na debe (negative) za su zama damuwa. Rankine yana fitowa a thermodynamics na Amurka, Réaumur kuma galibi a rubuce-rubucen tarihi — shi ya sa tsohon girke-girke zai iya ɓatar da wanda ya karanta shi a matsayin Celsius.
Tambayoyin da mutane ke yi
Shin gaskiya ne cewa −40 °C da −40 °F ɗaya ne?
Eh, kuma shi ne wuri ɗaya tilo da ma'aunan biyu ke haɗuwa. Digiri Fahrenheit sun fi na Celsius ƙanƙanta — tara daga cikinsu a kowane biyar — kuma ma'aunan biyu suna farawa daga sifili daban-daban; zafin da bambancin girma da bambancin farawa ke soke juna daidai shi ne ragi arba'in. A ƙasa da shi, lambar Fahrenheit ita ce ta fi ƙanƙanta daga cikin biyun.
Mene ne ma'aunin Rankine?
Cikakken ma'auni mai digiri masu girman na Fahrenheit. Sifilin Rankine shi ne absolute zero, kuma ruwa yana daskarewa a 491.67 °R. Don juyawa daga kelvin sai ka ninka da 9/5. Yana bayyana a wasu ayyukan injiniyanci da thermodynamics na Amurka, inda matakai masu girman Fahrenheit suke da sauƙi amma ana buƙatar sifili na gaskiya.
Shin amsar daidai ce?
Inda aka ayyana ma'aunai biyun ta hanyar juna da cikakkun lambobi, i — shafin yana faɗin haka a saman lambar, kuma zagaye kawai shi ne yawan lambobin da ake nunawa. Inda rabon ba shi da lambar goma mai ƙarewa, shafin yana nuna muhimman lambobi goma sha biyu kuma yana cewa alaƙar kintace ce maimakon ya yi kamar ba haka ba ne.
Shin wani abu da na rubuta yana barin na'urata?
A'a. Ana yin lissafin a cikin burauzarku; ba a ɗora komai ba, kuma babu uwar garke da za a ɗora zuwa gare ta. Ku buɗe shafin sau ɗaya zai ci gaba da aiki ko da an kashe hanyar sadarwa.
Matsalolin da aka warware da cikakken zafin jiki: daga Fahrenheit zuwa Rankine
Azuzuwan thermodynamics da kimiyyar lissafi a Amurka suna ba da matsaloli irin su “tayar mota a 50 °F an dumama ta zuwa 95 °F” ko “gwangwani a 70 °F an dumama shi zuwa 130 °F”. Amsa madaidaiciya tana buƙatar cikakken zafin jiki, kuma idan bayanan suna cikin Fahrenheit, zaɓi na halitta shi ne ma'aunin Rankine. Don canza °F zuwa °R, ƙara 459.67: 32 °F shi ne 491.67 °R, 70 °F shi ne 529.67 °R, kuma 212 °F shi ne 671.67 °R. Na'urar lissafin da ke sama tana ƙarawa yayin da kake rubutawa, kuma sassan da ke ƙasa suna bi ta matsalolin da aka saba don nuna dalilin da ya sa canzawar take da muhimmanci da kuma yadda ake guje wa kura-kuran da aka saba yi.
A nan za ka sami ƙa'ida tare da misalai da aka warware, taƙaitaccen bayani game da kowane ma'auni, kwatance, tarin matsalolin da aka warware da kura-kuran da za a guje wa. Ana yin lissafin a cikin burauzarka, kuma abin da ka rubuta ba a aika shi ko'ina.
Yadda ake canza °F zuwa °R: ƙara 459.67
Ƙa'ida
Ƙa'idar ita ce °R = °F + 459.67. Don haka 75 °F yana ba da 534.67 °R, 100 °F yana ba da 559.67 °R, kuma −40 °F yana ba da 419.67 °R. Don komawa baya, cire 459.67. Littattafan karatu da yawa suna zagaye ƙimar zuwa 460, wanda ya isa a aiki cikin sauri.
Misalai da aka warware
Iskar ɗaki a 70 °F ita ce 529.67 °R. Zafin jiki, 98.6 °F, shi ne 558.27 °R. Zazzaɓi na 104 °F shi ne 563.67 °R. Nitrogen mai ruwa a −320 °F shi ne 139.67 °R, kuma cikakken sifili a −459.67 °F shi ne 0 °R.
Me ya sa ƙari kawai
Digiri Rankine ɗaya da digiri Fahrenheit ɗaya girmansu ɗaya ne. Ma'aunan sun bambanta ne kawai a wuraren sifilinsu, waɗanda suke da nisan digiri 459.67 tsakaninsu, don haka ƙari ɗaya yana yin aikin gaba ɗaya.
Saurin dubawa
Rankine koyaushe yana sama da Fahrenheit da 459.67. Idan sakamakon lissafin “canza °F zuwa °R” ɗinka ya yi ƙasa da abin da ka shigar, to ka cire maimakon ka ƙara.
Ma'aunin Fahrenheit
Ma'aunin yau da kullum na Amurka
Fahrenheit yana sa 32 a wurin daskarewar ruwa da 212 a wurin tafasa. Shi ne ma'aunin ma'aunin zafi na Amurka, rahotannin yanayi da matsalolin littattafan karatu, don haka yawancin bayanai a darasi na Amurka suna zuwa cikin waɗannan digiri.
Inda yake bayyana
Ma'aunin zafi, matsalolin littattafan karatu, alamun na'urorin gida da rahotannin yanayi.
Ma'aunin Rankine
Cikakken ma'auni a rukunan Ingila
Rankine yana farawa daga cikakken sifili kuma yana amfani da digiri masu girman digiri Fahrenheit. Ba ya taɓa zama mara kyau, don haka ana iya amfani da shi kai tsaye a dokokin iskar gas, ƙa'idodin inganci da dokokin haskakawa. Alamarsa ita ce °R.
Inda yake bayyana
Darussan thermodynamics na Amurka, littattafan jagora na injiniya da teburan iskar gas.
Fahrenheit a kwatanta da Rankine
Ma'aunan biyu suna da mataki iri ɗaya, don haka canjin 50 °F canji ne na 50 °R. Wurin sifili kaɗai ya bambanta. Wannan yana da muhimmanci ga rabo: 100 °F ba sau biyu ya fi 50 °F zafi ba, amma 559.67 °R ya ninka 509.67 °R sau 1.098. Dokar kimiyyar lissafi da ke amfani da rabon zafin jiki dole ne ta yi amfani da cikakken ma'auni.
Ƙarin daidai ne, don haka zagayawa tana bayyana ne kawai a sakamakon da aka nuna. Kuskuren da aka fi yi shi ne yin amfani da dokar iskar gas kai tsaye a kan lambobin Fahrenheit.
Inda canzawar take bayyana
Matsala ta 1: tayar mota da ke ɗumama
Ana hura tayar mota zuwa 32 psig a 50 °F kuma ana tuƙa ta har ta kai 95 °F. Canza zuwa cikakken ma'auni: matsi ya zama 46.7 psia, kuma zafin su ne 509.67 °R da 554.67 °R. Rabon shi ne 1.088, don haka sabon matsi shi ne 50.8 psia, wato 36.1 psig. Amfani da Fahrenheit kai tsaye zai ba da amsa mara hankali, shi ya sa lissafin “canza °F zuwa °R” yake zuwa na farko.
Matsala ta 2: gwangwanin aerosol da aka dumama
Gwangwani a 70 psig da 70 °F an dumama shi zuwa 130 °F. Cikakken matsi shi ne 84.7 psia, zafin su ne 529.67 °R da 589.67 °R. Matsi na ƙarshe shi ne 94.3 psia, wato 79.6 psig. Shi ya sa gwangwani suke ɗauke da gargaɗi kada a ajiye su sama da 120 °F.
Matsala ta 3: moles na iska
Nawa ne iska a cikin kubik ƙafa 10 a 14.7 psia da 70 °F? Idan aka yi amfani da n = PV/RT tare da R = 10.73 psia·ft³/(lbmol·°R) da T = 529.67 °R, n shi ne 0.0259 lbmol, wato laba 0.75 na iska. Dole ne zafin ya kasance a Rankine don ƙimar R ta yi aiki.
Matsala ta 4: balan-balan a ɗaki mai ɗumi
Balan-balan yana ɗauke da 1 ft³ na iska a 70 °F. A ɗaki mafi ɗumi a 100 °F, da matsi iri ɗaya, yana ɗauke da 559.67/529.67 = 1.057 ft³. Balan-balan ɗin yana girma da kashi 5.7 cikin ɗari. Dokar Charles tana amfani da cikakken zafin jiki, don haka ɗalibin da ya raba 100 da 70 yana samun 1.43 da balan-balan da ya kusan girma rabi fiye da haka, wanda a fili ba daidai ba ne.
Matsala ta 5: iskar da ke bugun jirgi yayin tashi
Jirgin sama a Mach 0.8 a cikin iska a 60 °F, wato 519.67 °R, yana da zafin tsayawa na 519.67 × (1 + 0.2 × 0.64) = 586.2 °R, wato 126.5 °F. Iskar da ke kan hancin jirgin tana da zafi fiye da haka da digiri 66. Matuƙa suna ganin wannan a matsayin bambancin tsakanin jimillar zafin iska da zafin iska a tsaye. Lissafin “canza °F zuwa °R” yana ba da ƙimar farawa.
Dubawa da hankali
Kafin ka miƙa amsa, tabbatar cewa kowane zafin jiki a ƙa'idar dokar iskar gas cikakke ne kuma mai kyau. Ƙima kamar 70 ko 100 a cikin rabo gargaɗi ne. Wani dubawa kuma shi ne kwatanta girman canjin: rabo kusa da 1.05 ya saba ga canji na digiri 30 a zafin ɗaki, yayin da rabo na 1.4 yana nufin wani abu ya lalace.
Nitrogen mai ruwa da helium
Nitrogen mai ruwa a −320 °F shi ne 139.7 °R, oxygen mai ruwa a −297 °F shi ne 162.7 °R, kuma helium mai ruwa a −452 °F shi ne 7.7 °R. Waɗannan ƙananan lambobi masu kyau suna nuna yadda ruwan suke kusa da cikakken sifili. Raba da 1.8 yana ba da 77.6, 90.4 da 4.3 K, adadin da ake amfani da su a injiniyancin cryogenic a sauran duniya.
Jikin ɗan adam
Zafin jiki na 98.6 °F shi ne 558.27 °R, kuma zazzaɓi na 104 °F shi ne 563.67 °R, kashi 1 cikin ɗari kawai sama a cikakken ma'auni. Samfuran canja zafi na jiki suna amfani da cikakken zafin jiki don haskakawa, inda bambancin tsakanin fata a 91 °F da bango a 68 °F yake bayyana a matsayin lokaci na ƙarfi na huɗu.
Busasshen ƙanƙara da sanyi
Busasshen ƙanƙara yana zama tururi a −109.3 °F, wato 350.4 °R. Idan aka sanyaya shi zuwa wannan zafin, kwantena da aka rufe mai iskar gas yana rasa matsi daidai da cikakken zafin jiki. Kwalba da aka rufe a 70 °F aka kai ta −109 °F tana faɗuwa zuwa kashi 66 cikin ɗari na matsinta, domin 350.4/529.67 = 0.66. Wannan ba zai bayyana da lambobin Fahrenheit ba.
Ƙa'idojin spreadsheet
Sanya ƙimomin Fahrenheit a ginshiƙin A kuma yi amfani da =A2+459.67 a ginshiƙin B. Don akasin haka, yi amfani da =B2-459.67. Ga rabo, raba ginshiƙan Rankine biyu kai tsaye. Tsara da wurare biyu bayan ƙima kuma ka rubuta rukunin a kowane kai. Riƙe ginshiƙin ƙimomin asali don bin diddigi.
Zagayawa da daidaito
Littattafan karatu sukan zagaya 459.67 zuwa 460. Ga rabon zafin jiki kusa da 530 °R, kuskuren shi ne kashi 0.06 cikin ɗari, wanda ba shi da muhimmanci. Ga aiki mai daidaito, kamar daidaita na'urorin aunawa, riƙe dukkan lambobi. Bayar da sakamako da adadin lambobi masu muhimmanci iri ɗaya da shigarwa mafi ƙarancin daidaito.
Gajeriyar hanyar kai
Ƙara 460, sannan cire kashi ɗaya cikin uku. Ga 70 °F wannan yana ba da 530 − 0.33 = 529.67. Ga 212 °F yana ba da 672 − 0.33 = 671.67. A ƙiyasi cikin sauri 460 ya isa, kuma gyaran ana buƙatarsa ne kawai ga teburan da ke buƙatar daidaito.
Wuraren tunawa
0 °F shi ne 459.67 °R, 32 °F shi ne 491.67 °R, 59 °F shi ne 518.67 °R, 68 °F shi ne 527.67 °R, 98.6 °F shi ne 558.27 °R, kuma 212 °F shi ne 671.67 °R. Da waɗannan shida, za ka iya sanya kowace matsala a kan ma'aunin a kallo ɗaya.
Matakalar ƙimomin tunani
−459.67 °F shi ne 0 °R. −320 °F shi ne 139.7 °R. −40 °F shi ne 419.67 °R. 0 °F shi ne 459.67 °R. 32 °F shi ne 491.67 °R. 100 °F shi ne 559.67 °R. 212 °F shi ne 671.67 °R. 1,000 °F shi ne 1,459.67 °R. Matakala irin wannan tana saurin duba.
Matsala ta 6: dokar iskar gas ta haɗaka
5 ft³ na iska a 14.7 psia da 70 °F an matse shi zuwa 44.7 psia kuma an dumama shi zuwa 200 °F. Girman shi ne 5 × (14.7/44.7) × (659.67/529.67) = 2.05 ft³. Ana ɗaukar kowane rabo daga cikakkun adadi. Amsar ƙarshe tana nuna cewa matsewa zuwa matsi sau uku yana rage girman da kashi 59 cikin ɗari, ba 67 ba, saboda iskar gas ta fi zafi.
Dubawa ta juyawa
Don duba duk wani sakamakon canza °F zuwa °R, cire 459.67 ka ga ko ka koma farko. Idan 75 °F ya zama 534.67 °R, to 534.67 ban da 459.67 shi ne 75. Gwaji na biyu shi ne alama: Rankine ba ya zama mara kyau, don haka amsa mara kyau tana nufin abin da aka shigar yana ƙasa da cikakken sifili, wanda ba zai iya faruwa ba.
Alaƙa da kelvin
Rankine yana daidai da ƙimar kelvin sau 1.8. 527.67 °R shi ne 293.15 K, wato 20 °C. Ɗalibai da ke son tabbatar da sakamako na iya canza zafin jiki ɗaya zuwa kelvin su kwatanta, domin duka biyun cikakkun ma'auni ne. Rabon zafin jiki ya kamata ya fito iri ɗaya.
Bambancin zafin jiki
Canji na 50 °F canji ne na 50 °R. Canji na 25 °F shi ne 25 °R. Kada ka ƙara 459.67 a bambanci. A ma'aunin kuzari, q = m cp ΔT, ana amfani da bambanci, don haka Fahrenheit da Rankine suna ba da zafi iri ɗaya, kuma ana buƙatar canzawa ne kawai idan cikakkun ƙimomi sun shiga.
Rubuta rukunin yadda ya kamata
Rubuta Rankine a matsayin °R, tare da sarari bayan lambar, misali 529.67 °R. Wasu littattafan karatu suna rubuta R kaɗai, wanda za a iya rikitawa da ƙimar iskar gas. A rahoto, bayyana ma'aunin kusa da kowace ƙima. Idan adadi bambanci ne, rubuta “deg R” ko “°R” ka faɗa haka a rubutun.
Me ya sa ba a yi amfani da kelvin kawai ba
Darussa da yawa sun koma SI da kelvin, amma babban tarin aikin Amurka, daga dokokin tukunyar tururi zuwa tsofaffin manhajoji, yana amfani da rukunan Ingila. Koyon Rankine yana bar ɗalibi ya karanta waɗannan tushe ba tare da fassara kowace lamba zuwa SI ba. Gajeriyar al'ada da ƙa'idar lissafin “canza °F zuwa °R” a kai ita ce amsar zahiri.
Matsala ta 7: kwalba da aka rufe a cikin mota mai zafi
Kwalba mai tauri da aka rufe tana ɗauke da iska a 14.7 psia da 70 °F. Cikin mota ya kai 140 °F. Canza zuwa 529.67 °R da 599.67 °R: matsi ya zama 14.7 × 1.132 = 16.6 psia, ƙaruwar 1.9 psi. Murfin yana riƙewa, amma gwangwani siriri na iya kumbura. Ɗalibai da suke amfani da rabon Fahrenheit na 2 za su yi hasashen matsi na 29.4 psia, wanda yake nesa sosai. Saurin canza °F zuwa °R yana nuna bambancin.
Matsala ta 8: duba teburan tururi
Zafin cikawar tururi a 100 psia kusan 328 °F ne, wato 787.7 °R. Tururi a 14.7 psia yana a 212 °F, wato 671.67 °R. Rabon cikakkun zafin cikawa shi ne 1.173, ko da yake rabon Fahrenheit 1.55 ne. Teburan kaddarori suna lissafa °F a gefe, amma entropy da zafin musamman suna ga kowane °R, don haka sau da yawa ana nufin canzawa.
Matsala ta 9: gudun sauti
A rukunan Ingila, gudun sauti a iska shi ne 49.02 sau tushen murabba'in T a °R, a ƙafa a daƙiƙa ɗaya. A 70 °F, T shi ne 529.67 °R kuma gudun shi ne 1,128 ft/s. A 0 °F yana 1,051 ft/s kuma a 100 °F yana 1,160 ft/s. Safiya mai daskarewa tana rage gudun da kusan kashi 7 cikin ɗari idan aka kwatanta da rana mai sassauci.
Matsala ta 10: yawan iska
Yawan iska yana bin ρ = P/(RT), tare da R = 53.35 ft·lbf/(lbm·°R) ga iska. A 59 °F, wato 518.67 °R, da 14.7 psia, yawa shi ne 0.0765 lbm/ft³. A 100 °F, wato 559.67 °R, yana faɗuwa zuwa 0.0709 lbm/ft³. A 0 °F, wato 459.67 °R, yana hawa zuwa 0.0863. Amfani da Fahrenheit a ƙa'idar zai ba da yawa mara iyaka a 0 °F.
Matsala ta 11: ingancin Carnot
Injin da ya dace yana ɗaukar zafi a 1,000 °F kuma yana fitar da shi a 100 °F. Canza zuwa 1,459.67 °R da 559.67 °R. Ingancin shi ne 1 − 559.67/1,459.67 = kashi 61.7 cikin ɗari. Injuna na gaske suna samun 30 zuwa 40 cikin ɗari. Lambobin Fahrenheit za su ba da 1 − 100/1,000 = kashi 90 cikin ɗari, ƙiyasin da ya wuce kima sosai. Kowace matsalar inganci tana farawa da lissafin “canza °F zuwa °R”, domin ƙa'idar tana kwatanta cikakkun zafin jiki biyu.
Matsala ta 12: firiji
Firiza a 0 °F a cikin kicin a 100 °F tana da ingantaccen coefficient of performance na 459.67/100 = 4.6. Firiza ta gaske na iya samun 1.5 ko 2. Ɗaga zafin ɗakin zuwa 110 °F yana rage adadin da ya dace zuwa 4.2. Waɗannan lambobi suna nuna yadda kicin mai zafi yake cutar da inganci, kuma suna fitowa ne daga cikakkun zafin jiki.
Matsala ta 13: na'urar matsewa
Ana matse iska a 70 °F, wato 529.67 °R, adiabatically zuwa matsi sau shida. Zafin fitarwa shi ne 529.67 × 6^0.2857 = 883.7 °R, wato 424 °F. Na'urar sanyaya tana dawo da shi zuwa 100 °F kafin mataki na gaba. Ɗalibai da suka manta canzawa zuwa Rankine suna hasashen 70 × 1.67 = 117 °F, amsa mai nisa da gaskiya.
Matsala ta 14: haskakawa
Wuri mai zafi yana haskakawa daidai da ƙarfin huɗu na cikakken zafinsa. Ɗaga wuri daga 1,000 °F zuwa 1,500 °F, ko daga 1,459.67 °R zuwa 1,959.67 °R, yana ƙara haskakawa da (1,959.67/1,459.67)⁴ = sau 3.25. Da Fahrenheit, mutum zai sami sau 5, wanda ya wuce kima a tasirin.
Matsala ta 15: famfon zafi
Famfon zafi da ke ɗumama gida a 70 °F daga iskar waje a 20 °F yana da COP mai kyau na 529.67/50 = 10.6. Injuna na gaske suna kaiwa 3 zuwa 4. Idan zafin waje ya faɗi zuwa 0 °F, COP mai kyau yana raguwa zuwa 7.6, wanda yake nuna dalilin da ya sa aiki yake muni a tsananin sanyi. Lissafin yana buƙatar Rankine ga zafin cikin gida.
Ƙarin ƙimomi na canza °F zuwa °R
Dogon jerin canzawa
Idan ƙimar da kake buƙata ba ta cikin jerin farko ba, waɗannan ƙarin canzawa na iya zama kusa da isa a karanta kai tsaye:
- -273.15 °F = 186.52 °R
- -100 °F = 359.67 °R
- -20 °F = 439.67 °R
- 10 °F = 469.67 °R
- 15 °F = 474.67 °R
- 25 °F = 484.67 °R
- 30 °F = 489.67 °R
- 50 °F = 509.67 °R
Kura-kuran da ake yi yayin canza °F zuwa °R
Amfani da Fahrenheit a dokar iskar gas
Dokokin iskar gas suna buƙatar cikakken zafin jiki. Tayar mota ba ta canza matsi da rabon lambobin Fahrenheit.
Ƙara a bambanci
Canji na 50 °F canji ne na 50 °R. Kada ka ƙara 459.67.
Rikita Rankine da kelvin
Ma'aunan biyu suna bambanta da ma'auni na 1.8. 529.67 °R shi ne 294.26 K, ba 529.67 K ba.
Gajerun amsoshi
Ta yaya zan canza °F zuwa °R?
Ƙara 459.67.
Menene 68 °F a Rankine?
527.67 °R.
Menene 32 °F a Rankine?
491.67 °R.
Menene cikakken sifili a Fahrenheit?
−459.67 °F.
Lambata tana fita daga na'urata?
A'a, lissafin yana gudana a cikin burauzarka.
Ƙarin shafuka da taƙaitawa
Don sauran canza zafin jiki duba Canza °F zuwa K, Canza °F zuwa °Ré, Canza °C zuwa °R, Canza K zuwa °R, Canza °R zuwa °C, Canza km zuwa mi, Canza mi zuwa km, Canza L zuwa gal, Canza gal zuwa L. Akasin wannan shi ne Canza °R zuwa °F.
A taƙaice, lissafin “canza °F zuwa °R” yana nufin ƙara 459.67 sannan a rubuta rukunin kusa da amsar. Ana lissafa lambarka a cikin na'urarka, ba tare da asusu ba kuma ba tare da lodawa ba.