So here's a cute experiment, done by accident while on vacation.
Take a smooth china mug, and fill it with water.
Stir the water, so it's swirling nicely (if you don't do this only the
surface will get hot and the experiment probably won't work).
Put it in a microwave on high power for a minute or two. I used 2
minutes, but the microwave in question was probably not very high power.
Take it out, stir it *again* so it's swirling nicely, and pop it back
into the microwave for another minute or two.
Take it out. There may be a few bubbles, but on a good morning, it will
*not* be boiling, not what most of us mean by boiling, anyway.
Drop a teabag into the cup of water which isn't boiling.
Whoa, nelly -- bubbles galore! Now it's boiling!
Gosh, what was in the cup before I put the teabag in?
