Force & Motion

Physics in Action


Passively Cool: A Departure from A/C
A potential low-energy alternative to air conditioning.

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Sewing Kit Cartesian Diver
Exploring buoyancy with this quick experiment

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People in Physics


James Roche
James Roche is part artist, part skateboarder, part physicist, and full time funny man. This physicist and APS project coordinator knows how to make any experience fun and exciting. Physics after all, can be funny.

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Physics Buzz

Let Go, Tarzan!
Tarzan may have skillfully swung across the jungle on vines, but the same physics behind his artful motions also explain the worst belly flops at your local rope swing. So whether you're looking to dodge venomous snakes or make a big splash at the lake, ...

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Writer's Gallery


The Fifth Postulate
Many mathematicians since the time of Euclid attempted to solve a seemingly simple problem about parallel lines without success. Yet the success of their failures would reveal a whole new geometry and description of space and time.

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