Jawabanmu

Jawaban paling cerdas!
2014-04-25T20:55:09+07:00
Q = m.c.(T2-T1)
504000 = 2. 4200 (T2-20)
504.000 = 8400 T2 - 168000
8400 T2 = 336000
T2 = 40
jadi suhu akhirnya 40 derajat celcius
2 5 2
2014-04-25T20:56:30+07:00
504000J=2×4200×(t²-20°C) =8400×(t²-20°C) 8400t²-168000 504000+168000=8400t² 672000=8400t² 80=t²