/u/grkirchhoff's posts
When your car is in gear, but not moving, and the brake is on, where does the energy from the motor go?
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If the curvature of space works so well as an explanation for gravity, what is the motivation for a theory of a graviton? Are there any holes in the theory of gravity being due to the curvature of space?
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Probably a stupid question - is there anything that is wet that is not a liquid, or anything that is a liquid yet is not wet?
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So, other than numerical constants, what are the permittivity and permeability of free space? What exactly is it about particles that changes these values for being in a medium?
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If an alcubierre drive existed, what would a passerby see when looking at a passing ship that was using the drive to travel faster than light with respect to the observer? Would the observer still see a clock on the ship moving slower than his own clock?
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There is a post where a cat looks miserable in a costume (link inside). Can you actually use cats facial expressions to tell how they feel?
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