The Stanford mathematician Tadashi Tokieda demonstrates one of his physics “toys”: the curious higher and lower notes you hear when tapping a coffee mug with a spoon.
That's also why it says, "WOIN-ya WOIN-ya WOIN-ya WOIN-ya" when you stir it.
That's also why it says, "WOIN-ya WOIN-ya WOIN-ya WOIN-ya" when you stir it.
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