Board 31.0
Question 1
A. 10kg 
B. 335000 J/kg
C. 44.9 kJ
D. 74000 J/kg
E. 5.5 kg

Question 2
113000 J

Question 3
4520000 J
5000000 J
Question 4
630000 J
Question 5
0.15g
Question 6
4200 J
Question 7
4.5 kg
Question 8
199000 K/kg
Question 9
617 g
848 s (seconds)