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# Tag Archives: everything

## Electromagnetic induction in outer space and energy conservation

“lets pretend we are in space. and there  I have a permanent magnet rotor that and around it are copper windings. They do not touch and everything is floating with minimum friction (because we are in space)
imagine a generator with no brushes or bearings….

now my question is :
if i spin the rotor, and electrons start flowing on the copper(electricity)
would there be a negative force on the rotor to make it stop faster ?

Thank you

(Posted by )

Waiting for public response

## Gravity and Speed of light – for discussion

Greg Carter posted a question:

“I’ve been reading a few physics books lately and theres a question that i just cant seem to answer. Is the speed gravity is applied to an object faster then the speed of light. that might be the wrong way of explaining it an example ive used is that if the sun blew up randomly, since it takes eight minutes for light from the sun to reach earth, we should not experience anything for eight minutes because everything ive read says nothing travels faster then the speed of light but it just makes since to me that if that happened since f=m1*m2*G/R^2 is the force between the two objects that the earth(along with other planets) would be set off their orbit because there is no long that force acting there. what is wrong with my thinking?”

I am leaving it for open discussion.

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