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.
The Knight’s tour is a traditional chess problem where a lone knight is placed on a chess board and must visit each square only once. You can play this perfectly simple free implementation created by u/psrwo on Reddit. The source code is at github. The knight is randomly placed at the outset. I can’t visit […]
The Red Bull Rubik’s Cube World Cup was held November 17 in Moscow. Competitors squared off in four events: 3×3 Speed Cubing – solving the Rubik’s Cube as fast as possible; Fastest Hand – a challenge that solves the Rubik’s Cube with only one hand; Re-Scramble – pits competitors trying to replicate a computer generated […]
This is an anti-fascist puzzle made in occupied Netherlands circa 1940. Can you find the 5th pig? (Hint: Al Jaffee would have no problem finding it.) Solution [via r/interestingasfuck]
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When it comes to top-quality kitchen gadgets that won’t break the bank, nothing beats Gourmia. These eight best-selling Gourmia tools will help you take your culinary prowesses to the next level, and each one is available for an additional 15% off when you enter the coupon code COOKSAVE15 at checkout. 1. Gourmia GTF7350 6-in-1 Multi-Function […]
Traditional headphones are overrated, especially now that this HumBird Bone-Conducting Speaker allows you to enjoy a rich and completely unique listening experience depending on where you place it. A must-have item for true audiophiles looking to switch up their usual listening routine, this compact speaker uses cutting-edge bone conduction technology in order to deliver a […]