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Find number abc

If 9b222 - 5b753 = 39ac9 find number abc. Multiple solutions may exist.

Correct answers: 41

The first user who solved this task is Nílton Corrêa De Sousa.

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Johann Salamo Christoph Schweigger

Born 8 Apr 1779; died 6 Sep 1857 at age 78.German physicist who invented the galvanometer (1820), a device to measure the strength of an electric current. He developed the principle from Oersted's experiment (1819) which showed that current in a wire will deflect a compass needle. Schweigger realized that suggested a basic measuring instrument, since a stronger current would produce a larger deflection, and he increased the effect by winding the wire many times in a coil around the magnetic needle. He named this instrument a “galvanometer”in honour of Luigi Galvani, the professor who gave Volta the idea for the first battery. Thomas Seebeck (1770-1831) named the innovative coil, Schweigger's multiplier. It became the basis of moving coil instruments and loudspeakers.

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