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A hub on the uses, applications and hazards of Infrared radiation.
This is part 2 of a 6 part hands-on unit on Inventions and Simple Machines. Build and test catapults, lift an adult using a lever, test out screws of various threads, and more! My lessons are geared toward 3rd-4th grade...
A look at the possibility of time travel. Is it possible to time travel? It maybe possible but a lot of energy and technological hurdles must be overcome before it can happen.
Neil deGrasse Tyson is a preeminent scientist, and a superstar insofar as spreading the much needed interest in the pursuit of science. His engaging dialogue and unbridled enthusiasm make him great.
Principle of operation of transformers can be easily understood from this article. Basic working principle of the transformer is mentioned very clearly and briefly