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On this date Albert Einstein wrote a letter to the president saying that him and other scientists were working on making an atomic bomb using Uranium-235. Later on, with the Manhattan project (1945) the bomb was tested and created.
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Radar: system used to detect presence, direction, distance, and speed of aircrafts, ships or any other object. It works by sending out pulses of high-frequency electromagnetic waves that are reflected back to the object.
Sonar: A system for the detection of objects under water and for measuring the water's depth by emitting sound pulses and detecting or measuring their return after being reflected -
It was created as a top secret project code named ENIAC (in the US) and the Colossus (in Britain).
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Use radio broadcast system and high powered radio frequency transmitors to broadcast a television signal to the television receiver. Used for fun and family times. People got together around the tv as they used to do with the radio.
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Made for personal uses, when you buy things on credit or use someone else's money that you would give back with interests.
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An immensely powerful bomb whose destructive power comes from the rapid release of energy during the nuclear fusion of isotopes of hydrogen. It's a different version of the atomic bomb.
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USS Nautilus (SSN-571) was the name of the first nuclear sumbarine ever made. It has reached places that no submarine has reached before because of its poweful nuclear engine. Yet, it had many limitations.
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The first 3 point seat belt (used nowadays) was made in this date. But seat belts were used many years before that
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The National Aeronautics and Space Administration basically focused on exploring the space. The US was the first country that sent people to the moon, but the soviets made the first satellite, so it was like a competition between both countries
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It holds audio. To write on it you use magnetic recording head. People used it for fun at home, falimy times, as they did with the radio.
