What difference does that make? The metronomes and table are a closed system, so the fact that energy is transferred between them is moot. I think lutusp's ex

What difference does that make? The metronomes and table are a closed system, so the fact that energy is transferred between them is moot. I think lutusp's explanation makes a lot more sense: that when the metronomes sync up, they're at a lower energy level. They spend energy to decrease entropy.