I bought Thinking Physics, by Lewis C. Epstein in 1984. It's one of my favorite books of brain teasers. They are designed to help you gain a qualitative, intuitive sense of physics. The author stresses that after you read each of the many charmingly illustrated problems in the book, you should put the book away and take your time running a simulation of the problem in your head. This is great advice.
The book is broken up into sections: Mechanics (kinematics, Newton's Law of Motion, momentum and energy, rotation, gravity), Fluids, Heat, Vibration, Light, Electricity and Magnetism, Relativity, and Quanta. If you've never seen this book before, you're in for a treat.
Here's an example problem, which I grabbed from Futility Closet:
A tank of water has two holes of equal area, one at top and one at bottom. The top one leads to a downspout, so that both holes discharge their water at the same level. Ignoring friction, which hole produces the faster flow of water?
You actually don’t need to know the physics in order to solve this — it yields to an insight.
Magician David Kwong moonlights (er, daylights?) as a crossword puzzle creator for the New York Times. In the parlance of the craft, he is a “cruciverbalist,” one who is adept at making, or solving, crossword puzzles. (Wired)
Sometimes I blog about something and it goes nowhere, much like this girl’s domino: Sometimes I blog about something and it continues to weave its way to the many corners of the internet, much like this: But, sometimes I blog about something and it starts a chain reaction that looks more like this (I looked […]
Oh boy, I think I have a new hobby. I’ve just learned that you can combine puzzles, that have the same die cut, to make really awesome pieces of art. It had never occurred to me that manufacturers of mass-produced puzzles cut different puzzles of theirs in the same way, making the pieces interchangeable. It […]
Businesses of any size continue to use PDFs despite – and perhaps because of – their stubborn resistance to simple editing. But for those who need a little flexibility on their documentation, the search is over for alternative software. PDF Expert for Mac is the catch-all solution for wrangling those PDFs, and it’s available at […]
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