system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does a coffee maker make water very hot so much faster than boiling water over a burning stove?
gpt
A typical drip coffee machine has a set of tubing that runs from the bottom of the reservoir, into the burner below the coffee pot, and back up to above the grinds.

When water goes down this tubing, it passes a one-way valve, so that the water that gets heated never mixes back with the reservoir. This means that at any point in time, the coffee maker is only heating a little bit of water, which is significantly faster than boiling the entire thing.

That hot water is pushed up the tubing by the boiling action, and drips into the grinds. The reduction in pressure means the one-way valve will open up again, allow more cold water in, and more heating happens.

Essentially, coffee makers are faster than a pot because they heat the water sort of 'sequentially', since only a small amount is needed at any given time.