Ragebait answers only

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[–] 17 points 3 months ago (3 children)

Speedy thing goes in, speedy thing comes out.

Cube had no speed going in, therefore no speed going out. The portal speed is irrelevant

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  • [–] 3 points 3 months ago (1 child)

    The cube has a speed of about 30km/s around the sun. You want to measure speed relative to the blue portal, but why that one and not the orange one?

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  • [–] 3 points 3 months ago

    But reference frame changes as the cube passes through the portal. The piston would feel resistance as its momentum is transferred to the cube to conserve it.

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