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Find the number of ways to p...

Find the number of ways to place three black pawns on a chessboard.

Correct answers: 23

The first user who solved this task is Neelima Subrahmanyam.

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One night at the dinner table...

One night at the dinner table, the wife commented, "When we were first married, you took the small piece of steak and gave me the larger. Now you take the large one and leave me the smaller; You don't love me any more..."
"Nonsense, darling," replied the husband, "you just cook better now."

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James David Forbes

Born 20 Apr 1809; died 31 Dec 1868 at age 59.Scottish physicist noted for his research on heat conduction and glaciers. In 1836-44, he described the polarization (alignment of waves to vibrate in a plane) of radiant infrared heat by the mineral tourmaline, by transmission through a bundle of thin mica plates, and by reflection from the surfaces of a pile of mica plates. In 1846 he began experiments on the temperature of the Earth at different depths and in different soils near Edinburgh. Later he investigated the laws of heat conduction in bars, and in his last piece of work reported that iron conducts heat less efficiently as its temperature rises. He was among the first to study glacier movements and was involved with Tyndall in the great glacier controversy of the 1850s.

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