Back-of-the-Envelope Physics (Johns Hopkins Paperback)

A compilation of 101 examples of back-of-the-envelope calculations: What note do you get when you blow across the top of a Coke bottle? Could you lose weight on a diet of ice cubes? How can a fakir lie on a bed of nails without getting hurt? Does draining water in the northern hemisphere really swirl in a different direction than its counterpart below the equator?