How Physicists Build a Bridge

How Physicists Build a Bridge « Joe Doliner

This is a short story and well worth reading.

It reminds me of a story I heard about Neils Bohr:
"Describe how to determine the height of a skyscraper with a barometer."

One student replied:

"You tie a long piece of string to the neck of the barometer, then lower the barometer from the roof of the skyscraper to the ground. The length of the string plus the length of the barometer will equal the height of the building."

via the almighty snopes

I love this kind of thing.