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> How much mass would need to be collided to suck in Earth?

A significant fraction of the mass of the Earth. Black holes don't "suck" any harder than other objects of the same mass.

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An Earth mass black hole has a radius smaller than the plug in your bath tub. It would take a very long time to cram the Earth down such a small hole.

An Earth mass black hole in someone's bathtub wouldn't be such a walk in the park. The mass interaction would rip Earth apart.

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