# Browse Physics

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A uniform city street plan may produce heavy traffic everywhere, whereas a random network of road connections leaves some roads open, according to a mathematical model.

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Statistical physicists have long known that brief reductions in entropy are possible. Now, entropy changes in two nonequilibrium systems have been calculated exactly.

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How screening affects the Coulomb interaction has long been considered a solved problem, but an analysis indicates there is an error in the widely used analytical approach.

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Mathematical tools from the theory of magnets applied to seismic data reveal that the stronger an earthquake, the sooner the next one will occur, and it could be hundreds of miles away.

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A computer simulation can better mimic real highway traffic when it includes simple assumptions about driver psychology.