Search results for “cobalt”

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How a Digital Compass Works

An analog compass responds to the Earth's magnetic field. A digital smartphone compass, however, works without a magnetic needle. The job of the magnetic needle is taken over by a sensor made of three layers. Authors: ZDF/3sat/nano/Autorenkombinat/Josephine Blume, Holger Barthel, Ingo Schwarz /Alex

Terra X

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Efficient Energy Production with Hydrogen Fuel Cells: Finding the Right Catalysts

For more Science Videos: https://lt.org/ * One very promising way of producing energy in an environmentally friendly manner is via hydrogen fuel cells. In this video, ALBA GARZÓN MANJÓN explains that a fundamental barrier to the widespread adoption of this technology is the prohibitive cost of the

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