It’s the horizontal difference that matters and not the vertical one, so the water boils about 200s earlier or 20% faster (according to this one experiment) which quite nice!
Note also that there are several free parameters in this example. E.g., I just moved to Germany, and now have wimpy German burners on my stove. If I put on a large container with 6L or more of water, and I do not cover it, the water will never go beyond bubble formation into a light simmer, let alone a rolling boil. If I cover the container at this steady state, it reaches a rolling boil in about another 90s.
I checked and it does work.
This effect is so much smaller than I would have predicted.
It’s the horizontal difference that matters and not the vertical one, so the water boils about 200s earlier or 20% faster (according to this one experiment) which quite nice!
Note also that there are several free parameters in this example. E.g., I just moved to Germany, and now have wimpy German burners on my stove. If I put on a large container with 6L or more of water, and I do not cover it, the water will never go beyond bubble formation into a light simmer, let alone a rolling boil. If I cover the container at this steady state, it reaches a rolling boil in about another 90s.