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What are design considerations for an RCS test range be relocated fully underground?

It would probably be designed in the same manner as an EMC test chamber, except WAY bigger. That being said, even with very sophisticated radar absorbing walls I'm not sure you could reduce the ...
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Could large electromagnets be used to stop active shooters?

How practical is this idea? Not practical at all. First, we'll start with doing it even if it were free. You can't turn this monster magnet on until the event happens. We aren't going to de-...
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How powerful should a magnet be to be able to pick the cans from the floor?

A magnet will never be able to "pick up" an aluminum object, no matter how strong. To move aluminum with a magnet, you have to subject it to a changing magnetic field. This field will ...
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Does an iPhone on airplane mode continue to emit electromagnetic radiation field?

All electric and electronic devices emit EM waves as a matter of course because changing current flows will produce waves like a motor, clock, or pocket calculator. But then there are also devices ...
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Does an iPhone on airplane mode continue to emit electromagnetic radiation field?

If I check the devices using the router app on my iPhone, my iPad is shown as connected to the router. Once I put my iPad into "airplane mode" then it gets removed from the list of connected ...
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