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May 7, 2007

Jeff R.: M=m/(sqrt(1-v^2/c^2))

We found an old slot-car race set at a garage sale last week, and, of course, Alva was entralled. Of course, about ten minutes after setting it up and running a few test races with Niki, they both decided that the cars were far too slow, and began tinkering.

They mostly managed to keep the cars on the tracks, but one hypersonic projectile careening through the living room TV is one too many, so we moved them to the basement. Just in time, too, since the very next day the cars had enough relativistic mass to crack the house's foundation.

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