mhn jawab no.8, 9, 10

8) Energi = masa×kalor jenis×perubahan suhu
= 2 kg × 400J/Kg °C × (38-28)°C
= 2 kg × 400J/Kg °C × 10°C
= 8000 Joule
9) Energi = masa×kalor jenis×perubahan suhu
54000 J = m × 600 J/Kg °C × (50-0) °C
54000 J = m × 600 J/Kg °C × 50 °C
[tex]m \: = \frac{54000}{600 \times 50} [/tex]
m = 1,8 kg