Cutubka kuleylku waa kalooriga (oo loo soo gaabiyo kal). Kalorigu waa xaddiga kulaylka loo baahan yahay si loo kordhiyo heerkulka 1 garaam oo biyo ah 1 C ( oo sax ah laga bilaabo 14,5 C ilaa 15,5 C ). Xaddiga kulaylka loo baahan yahay wuu kala duwan yahay heerkulka biyaha ee kala duwan . Xaddiga kulaylka isku midka ah, kororka 1 C ee heerkulka biyaha wuxuu dhacaa oo keliya inta u dhaxaysa 14,5 C iyo 15,5 C. Cutubka kulaylka ee inta badan la isticmaalo, gaar ahaan si loo muujiyo qiimaha tamarta cuntada, waa kiiloogaraam (kcal). 1 kcal = 1000 kaloori. Magac kale oo loogu talagalay 1 kcal = 1 Kalori (capital K). Cutubka kulaylka ee nidaamka Ingiriiska waa Btu (cutubka kulaylka Ingiriiska). 1 Btu = xaddiga kulaylka loo baahan yahay si loo kordhiyo heerkulka 1 rodol oo biyo ah 1 F ( oo sax ah laga bilaabo 63 F ilaa 64 F ).
Kulaylku wuxuu la xiriiraa tamarta, sidaa darteed waxaan u baahanahay inaan fahanno xiriirka ka dhexeeya cutubyada kulaylka iyo cutubyada tamarta. Iyada oo lagu saleynayo tijaabooyin ay sameeyeen Joule iyo saynisyahano kale, waxaa la ogaaday in 4,186 Joules oo shaqo ah ay u dhigantaa 1 kaloori oo kuleyl ah.
1 kaloori = 4,186 Joules
1 kcal = 1000 kaloori = 4186 Joules
1 Btu = 778 ft.lb = 252 kaloori = 1055 Joules
(1 kaloori = 4,186 Joules iyo 1 kcal = 4186 ayaa la yiraahdaa kuleyl farsamo)
Tusaale su'aal ku saabsan kuleyliyaha farsamada
1. 2 kcal (kilokalori) = ….. kalooriyo?
Dood
1 kcal = 1000 kaloori
2 kcal = 2 (1000 kaloori) = 2000 kaloori
2. 4 Kalori = ….. kalooriyo?
Dood
1 Kalori (capital K) = 1 kcal = 1000 kaloori
4 Kalori = 4 (1000 kaloori) = 4000 kaloori
3. 10 kaloori = ….. Joules?
Dood
1 kaloori = 4,186 Joules
10 kaloori = 10 (4,186 Joules) = 41,86 Joules
4. 5 kcal = ….. Joules?
Dood
1 kcal = 1000 kaloori = 4186 Joules
5 kcal = 5 (4186 Joules) = 20930 Joules
5. 2000 Joules = ….. kcal?
Dood
4186 Joules = 1 kcal
8372 Joules = 8372 / 4186 = 2 kcal
2000 Joules = 2000 / 4186 = 0,4777 kcal
