4 tusaale oo ku saabsan su'aalo gaar ah oo ku saabsan awoodda kulaylka iyo kuleylka
1. Kee baa si dhakhso ah u kululaada marka la wada qalajiyo qorraxda kulul, aluminium ama naxaas? Kulaylka gaarka ah ee aluminiumka = 900 J/kg o C iyo kulaylka gaarka ah ee naxaasta = 390 J/kg o C.
Dood
Inta uu kulaylka gaarka ah ee shaygu sii weynaado, ayuu sii dheeraadaa inta uu shaygu kululaanayo, lidkeedana, kulaylka gaarka ah ee shaygu sii yaraanayo, ayuu si dhakhso ah u kululaanayaa.
Kulaylka gaarka ah ee naxaasta ayaa ka yar kulaylka gaarka ah ee aluminiumka, sidaas darteed naxaasta ayaa si dhakhso ah u kululaataa.
2. Shay culeyskiisu yahay 2 kg wuxuu nuugaa 100 kaloori oo kuleyl ah marka heerkulkiisu uu ka beddelo 20 o C ilaa 70 o C. Kulaylka gaarka ah ee shayga waa...
Dood
Waa la ogyahay in:
Cufnaanta (m) = 2 kg = 2000 g
Kulayl (Q) = 100 kalori
Isbeddelka heerkulka (Δ T) = 70 o C – 20 o C = 50 o C
La weydiiyay: Kulayl gaar ah oo shayga ah (c)
Jawaab:
c = Q / m Δ T
c = 100 kalori / (2000 garaam) (50 o C)
c = 100 kalori / 100.000 gr o C
c = 10 2 kalori / 10 5 g o C
c = (10 2 kaloori)( 10 -5 gr -1 o C -1 )
c = 10 -3 kalori gr -1 o C -1
c = 10 -3 kalori/ g o C
Kulaylka gaarka ah ee shayga waa 10 -3 kalori/gr o C
3. Kulaylka gaarka ah ee biyuhu waa 4180 J/kg C o . Awoodda kulaylka ee 2 kg oo biyo ah waa…..
Dood
Waa la ogyahay in:
Kulayl gaar ah oo biyo ah (c) = 4180 J/kg C o
Cuf (m) = 2 kg
La weydiiyay: Awoodda kulaylka (C)
Jawaab:
C = mc
C = (2 kg)(4180 J/kg C o )
C = (2)(4180 J/C o )
C = 8360 J/C o
4. Kulaylka gaarka ah ee aluminiumku waa 900 J/kg C o . Awoodda kulaylka ee 2 garaam oo aluminium ah waa…..
Dood
Waa la ogyahay in:
Kulayl gaar ah oo aluminium ah (c) = 900 J/kg C o = 9 x 10 2 J/kg C o
Cufnaanta (m) = 2 garaam = 2/1000 kg = 2/10 3 kg = 2 x 10 -3 kg
La weydiiyay: Awoodda kulaylka (C)
Jawaab:
C = mc
C = (2 x 10 -3 kg)( 9 x 10 2 J/kg C o )
C = 18 x 10 -3 x 10 2 J/C o
C = 18 x 10 -1 J/C o
C = 1,8 J/C o
