A regular kettle might make a little noise, (I’m actually not sure) but the electric kettle gets so loud before the water boils that I can’t hear the news. What’s making the noise?
In: Engineering
Its the cavitation – water heated right next to the heating element boils and turns into steam bubbles, the bubbles rise away from the heating element, lose their heat and turn back into water, causing the bubbles to collapse.
These bubbles collapsing makes the noise – it also gets deeper the closer it is to boiling, because the bubbles are able to get bigger before they collapse!
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