Why does the tea kettle sound different when it’s about to start whistling?
In: Physics
I don’t actually know, but I would assume that this is due to a change in the density of the vapor traveling over the opening causing the whistle. As it gets hotter, the density of the vapor would decrease. Additionally, the amount of water in the vapor could be changing too. Initially the air pushing out of the hole would have less water, but as the water begins to boil more water would enter the gas that is passing across the hole changing the density of the vapor and the pitch of the whistle.
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