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In 1820, the Danish professor of physics, Hans Christian Oersted demonstrated a simple experiment on electricity at a lecture. During the demonstration he discovered that the electric current passing through the wire affects the magnetic compass needle located under it which was the first connection found between electricity and magnetism. According to one version this happened on February 15, 1820.
On November 18, 1971 Intel released its first microprocessor (Model 4004), which started a revolution in electronics.
International Day of Happiness is a global event arranged by the United Nations annually on March 20. It serves to remind us that being happy is a human right and worth celebrating.
Pi Day is an annual celebration of the mathematical constant π. Date March 14 is chosen because of 3/14 in the month/day format.
On October 25, 1955 Tappan Company for the first time introduced a domestic microwave oven weighing about 60 kg.
Phonograph, the first device for recording and reproducing sound, was invented by Thomas Edison and introduced on November 21, 1877.
It is believed that the first voltmeter was invented by M. Faraday, in 1830, a year before he discovered the phenomenon of electromagnetic induction, on which the operation of a whole class of electrical measuring instruments is based, and half a century before the adoption of the voltage unit “volt”. Interestingly, no drawings of this voltmeter could be found.
On December 9, 1968, American inventor Douglas Carl Engelbart demonstrated the first computer mouse to the public at the San Francisco Computer Science Conference.
This holiday takes place on April 7 every year. Now often used as a synonym for the International System of Units (or SI), the metric system is a system of measurement used in most countries of the world except the USA and a few other countries.
On November 9, 1942, US Army radio operator Harry Turner set a record for the fastest speed (175 characters per minute) of transmitting Morse code characters sent by a straight key.
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