Question: Suppose that, while lying on a beach near the equator watching the Sun set over a calm ocean you start a stopwatch just as the

Suppose that, while lying on a beach near the equator watching the Sun set over a calm ocean you start a stopwatch just as the top of the Sun disappears. You then stand elevating your eyes by a height H = 1.70m, and stop the watch when the top of the Sun again disappears. If the elapsed time is t = 11.1 s, what is the radius r of Earth.

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