Walking With Coffee a Little Understood Physics Feat

Walking With Coffee a Little Understood Physics Feat
AP Photo/Alan Diaz, File

Walking with coffee is something most of us do every day without considering the balancing act it requires. In fact, there’s a lot of physics preventing the coffee from spilling over.

The coffee, a thermally agitated fluid contained in a cup, has internal degrees of freedom that interact with the cup, which, in turn, interacts with the human carrier.

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