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Find number abc

If 7ab05 + 5a1b7 = 1c7102 find number abc. Multiple solutions may exist.

Correct answers: 0

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A gang of robbers broke into a...

A gang of robbers broke into a lawyer's club by mistake. The old legal lions gave them a fight for their life and their money. The gang was very happy to escape.
"It ain't so bad," one crook noted. "We got $25 between us."
The boss screamed: "I warned you to stay clear of lawyers -- we had $100 when we broke in!"

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Armand-Hippolyte-Louis Fizeau

Died 18 Sep 1896 at age 76 (born 23 Sep 1819). French physicist who was the first to measure the speed of light successfully without using astronomical calculations (1849). Fizeau sent a narrow beam of light between gear teeth on the edge of a rotating wheel. The beam then traveled to a mirror 8 km/5 mi away and returned to the wheel where, if the spin were fast enough, a tooth would block the light. Knowing this time from the rotational speed of the wheel, and the mirror's distance, Fizeau directly measured the speed of light. He also found that light travels faster in air than in water, which confirmed the wave theory of light, and that the motion of a star affects the position of the lines in its spectrum. With Jean Foucault, he proved the wave nature of the Sun's heat rays by showing their interference (1847).

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