carbonel: (IKEA cat)
carbonel ([personal profile] carbonel) wrote2015-09-04 11:38 am

A household physics question

Most mornings, I have coffee to drink. Sometimes regular coffee made with my Keurig coffee maker, and sometimes a latte, made with an espresso maker and foamer. In both cases, the vagaries of the devices means that the coffee comes to within about an eighth of an inch of the top of the coffee mug. In the case of the latte, there's another quarter-inch or so of foam above the liquid.

Is it just my imagination, or is my coffee less likely to spill when there's foam on top than when it's just plain coffee? Could the foam actually be providing some stabilization?

It seems that way to me, but I have no idea if there's any justification for that feeling.

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