Which energy value is not $2400\ \text{J}$?
- Athe decrease in gravitational potential energy of a mass of $60\ \text{kg}$ when it moves vertically downwards through $40\ \text{m}$ near the Earth’s surface
- Bthe energy transferred in $15\ \text{s}$ by a machine of power $160\ \text{W}$
- Cthe kinetic energy of a mass of $12\ \text{kg}$ moving at a speed of $20\ \text{m s}^{-1}$
- Dthe work done by a gas expanding against a constant external pressure of $120\ \text{kPa}$ when its volume increases by $0.020\ \text{m}^3$