1.2×10 9 J Inflight 100-ton Boeing 757-200 at 300 knots (154 m/s) 1.4×10 9 J Theoretical minimum amount of energy required to melt a tonne of steel (380 kWh) 2×10 9 J Energy of an ordinary 61 liter gasoline tank of a car. 2×10 9 J The unit of energy in 3×10 9 J