Perpetual motion devices are either a gag, a scam, or as in the case of this particular toy that [Big Clive] bought on AliExpress, a rather fascinating demonstration of a contact-free inductive sensor ...
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Is this a real perpetual motion device?
This experiment puts a supposed perpetual motion device to the test. We break down how it works, what physics says should happen, and whether the motion can actually last without an external energy ...
Similar to the Internet, Global Positioning System (GPS) satellite navigation is now ubiquitous technology integrated into all aspects of daily life. GPS enables emergency vehicles to find the ...
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