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Hypothetical situation in which, for simplification, only some physical aspects are considered in order to further understand or reveal contradictions between the laws governing them.

3 votes

Clarification on Heisenberg thought experiment

Many (including Bohr) have critcized Heisenberg's gamma ray microscope thought experiment because it makes it seem like the electron has a definite position before it's measured, and that the uncertai …
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34 votes
Accepted

Is a "hot cube" (analogous to an ice cube) a physical possibility?

Yes, it's possible, but as others have mentioned, such "hot cubes" would be rather dangerous. Perhaps a self-warming coffee cup is possible, but it's still not a great idea. To be specific, let's assu …
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6 votes

Ambiguity in applying Newton's shell theorem in an infinite homogeneous universe

by choosing the location of × I can make it accelerate in any direction. This freedom of choice is the key to the puzzle. I'll assume Newtonian gravity in a static universe filled with a homogene …
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