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Verified answer
Nomor 30500 gr=0,5 kg
84 kJ=84000 J
maka;
Q=m.C.(t2-t1)
84000=0.5.4200.(t2-20)
84000=2100.(t2-20)
84000/2100=t2-20
40=t2-20
40+20=t2
60=t2
jadi suhu akhirnya adalah 60 derajat celcius
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