My eldest, to his chemistry teacher: So, given that atoms are composed almost completely of space, how come we seem solid?
My kind of kid. (His teacher said that the electrons are moving so quickly that they atoms act solid even though they aren't. She also said it was an intelligent question.)
(This arose because we had a discussion about whether if a cat killed a mouse, and then choked on the dead mouse when it tried to eat the mouse, whether the mouse could be said to kill the cat. I made some remark like "Or maybe it was a Shrödinger's cat, and we don't know if it's really dead..." Which meant I had to explain Schrödinger's cat thought experiment. His response was "Oh my God, I actually understood that!" We then briefly discussed Heisenberg's Uncertainty Principle. Briefly, because although I can discuss the general outlines of quantum theory, at least as I learned it, which may be hopelessly out of date and irrelevant now, anything in more depth than that is beyond me.)
My kind of kid. (His teacher said that the electrons are moving so quickly that they atoms act solid even though they aren't. She also said it was an intelligent question.)
(This arose because we had a discussion about whether if a cat killed a mouse, and then choked on the dead mouse when it tried to eat the mouse, whether the mouse could be said to kill the cat. I made some remark like "Or maybe it was a Shrödinger's cat, and we don't know if it's really dead..." Which meant I had to explain Schrödinger's cat thought experiment. His response was "Oh my God, I actually understood that!" We then briefly discussed Heisenberg's Uncertainty Principle. Briefly, because although I can discuss the general outlines of quantum theory, at least as I learned it, which may be hopelessly out of date and irrelevant now, anything in more depth than that is beyond me.)