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Earth-Moon Fire Pole

Earth-Moon Fire Pole   My son (5y) asked me today: If there were a kind of a fireman’s pole from the Moon down to the Earth, how long would it take to slide all the way from the Moon to the Earth? Ramon Schönborn, Germany First, let’s get a few things out of the way: …

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Toaster vs. Freezer

Toaster vs. Freezer Would a toaster still work in a freezer? —My Brother, My Brother and Me, Episode 343, discussing a Yahoo Answers question On a recent episode of Justin, Travis, and Griffin McElroy's terrific advice podcast, My Brother, My Brother and Me, the brothers pondered a Yahoo Answers question about what would happen if …

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Coast-to-Coast Coasting

Coast-to-Coast Coasting What if the entire continental US was on a decreasing slope from West to East. How steep would the slope have to be to sustain the momentum needed to ride a bicycle the entire distance without pedaling? —Brandon Rooks Too steep to actually build, sadly. But for the next best thing, I suggest …

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Hide the Atmosphere

Hide the Atmosphere Earth’s atmosphere is really thin compared to the radius of the Earth. How big a hole do I need to dig before people suffocate? —Sam Burke The idea here is straightforward: When you dig a hole in the ground, the hole fills up with air.[1]The dirt you pile up outside the hole …

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