Why do we heat water by lighting a fire beneath the pot? Why not heat it from the surface? This is actually a fascinating bit of physics. If you heat the surface of the water with a flame, the upper layer will indeed warm up quickly. But hot water is less dense than cold water, so it stays on top. The cold water below can't rise to absorb the heat, and can only get a little warmth seeping down from above. Once the hot water on top absorbs enough heat, it turns to steam and escapes the pot, while the water below remains cold. Faced with capital towering above them, where can those at the bottom turn?
Theme: The bitterness and helplessness of working people.
