Chiyero chekupisa ndicho calorie (kal yakapfupikiswa). Kalori huwandu hwekupisa hunodiwa kuti uwedzere tembiricha ye 1 gram yemvura ne 1 C ( kubva pa 14,5 o C kusvika 15,5 o C). Huwandu hwekupisa hunodiwa hunosiyana patembiricha dzakasiyana dzemvura . Pahuwandu hwakafanana hwekupisa, kuwedzera kwe 1 C mutembiricha yemvura kunoitika chete pakati pe 14,5 o C ne 15,5 o C. Chiyero chekupisa chinowanzoshandiswa, kunyanya kuratidza kukosha kwesimba rechikafu, i kilocalorie (kcal). 1 kcal = 1000 macalorie. Rimwe zita re 1 kcal = 1 Macalorie (capital K). Chiyero chekupisa cheBritish system iBtu (British thermal unit). 1 Btu = huwandu hwekupisa hunodiwa kuti uwedzere tembiricha ye 1 pound yemvura ne 1 F o (kubva pa 63 o F kusvika 64 o F).
Kupisa kwakabatana nesimba, saka tinofanira kunzwisisa hukama huripo pakati pezvikamu zvekupisa nemayuniti esimba. Zvichibva pakuedza kwakaitwa naJoule nevamwe vesainzi, zvakaonekwa kuti maJoules 4,186 ebasa akaenzana nekoriori imwe chete yekupisa.
1 macalorie = 4,186 majoules
1 kcal = 1000 macalorie = 4186 Joules
1 Btu = 778 ft.lb = 252 macalorie = 1055 Joules
(1 calorie = 4,186 Joules uye 1 kcal = 4186 inonzi tambo yekupisa yemakanika)
Muenzaniso wemubvunzo wekupisa kwemuchina
1. 2 kcal (makirogiramu) = ….. macalorie ?
Kukurukurirana
1 kcal = 1000 macalorie
2 kcal = 2 (1000 macalorie) = 2000 macalorie
2. Macalorie mana = ….. macalorie?
Kukurukurirana
Macalorie 1 (capital K) = 1 kcal = 1000 macalorie
Macalorie mana = 4 (macalorie chiuru) = 4000 macalorie
3. Macalorie gumi = ….. Joules?
Kukurukurirana
1 macalorie = 4,186 majoules
Makoriori gumi = 10 (4,186 Joules) = 41,86 Joules
4. 5 kcal = ….. Joules ?
Kukurukurirana
1 kcal = 1000 macalorie = 4186 Joules
5 kcal = 5 (4186 Joules) = 20930 Joules
5. Majoules 2000 = ….. kcal ?
Kukurukurirana
4186 Joules = 1 kcal
8372 Joules = 8372 / 4186 = 2 kcal
2000 Joules = 2000 / 4186 = 0,4777 kcal
