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Learn about the quest to design a perpetual motion machine, one man's claim to have invented it, and how the hoax violates ethics in science.
It is an educational content of CK-12 Foundation (to access ...
Hipervinculo Inglés-Lengua extranjera
"Educational resource aimed at learning about compound machines, using the examples of how bicycles and escalators work. " Fuente: Proyecto Agrega Compound machines es un contenido did&aacu ...
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