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Islam Usman

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171
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169. Thien-Trang Nguyen 27
170. Atila Tot 27
171. Islam Usman 26
172. Nimish Mittal 25
173. C J H 25
last 3 solved tasks
MATH PUZZLE: Can you replace the question mark with a number?
How many cubes are there?
MATH PUZZLE: Can you replace the question mark with a number?

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.

Pilot: Have you ever flown in ...

Pilot: Have you ever flown in a small plane before?

Passenger: No, I have not.

Pilot: Well, here is some chewing gum. It will help to keep your ears from popping.

Pilot (after the plane landed): Did the gum help?

Passenger: Yep. It worked fine. The only trouble is I can’t get the gum out of my ears.
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