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Wednesday, June 4th, 2003

Time Event
1:25p
Hmm...
Apparently last week wasn't my last class. In fact, I have to teach a class in 1.5 hours.
9:06p
Your random physics thought for the day
(From a problem set my students just handed in...)

The amount of energy it takes to bring water from room temperature to a boil is enough to launch it 34km straight up. The amount of energy it would take to boil it down all the way - until it all evaporated - would launch it 270km.

Compare this to a typical altitude for a 747, about 11km, or for a space shuttle, about 150km.

Damn. Water has a very high heat capacity.

And the idea of launching a liter of water 34km into the air is pretty cool.

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