Jawabanmu

2014-01-25T19:45:37+07:00
QT=QL
m.c.deltaT= m.c.deltaT
20.4200.[tc-20]=10.4200.[50-tc]
20tc-400=500-10tc
30tc=900
tc=30
jadi suhu campurannya 30'C




2014-01-25T19:56:42+07:00
M1 . c1 . (t1 -tc) = m2 . c2 . (tc -t2)
2000. 1 . (tc-20) = 10 . 1 . ( 50-tc)
2000 (tc-20) = 10 ( 50-tc)
2000 tc- 40.000 = 500 -10 tc
1990 tc = 45.000
tc = 22,6 c