mlscience: “The Eiffel tower is Paris’s most recognizable landmark, and is of key importance to @mlscience. So far, the Eiffel tower has been used in three separate calculations as a reference (one of which hasn’t been posted yet!). Really, we...
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mlscience:

The Eiffel tower is Paris’s most recognizable landmark, and is of key importance to @mlscience. So far, the Eiffel tower has been used in three separate calculations as a reference (one of which hasn’t been posted yet!). Really, we wouldn’t know what to do without it.

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Melting the entire puddle iron structure of the Eiffel Tower (which means this excludes the stone foundations, paint, etc.) and compessing it into a big ball would give you this. 

The sphere would have a volume of ~935,000 Liters and would weigh ~7,300,000 Kilograms.

Some more calculations regarding the Chemistry and Physics of the composition of the Eiffel Tower can be found here: http://www.thechalkface.net/resources/melting_the_eiffel_tower.pdf

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It’s still pretty big.

(Sizes visualized with http://socialcompare.com/en/tools/compare-sizes)

(Image sources: X, X)

(Data sources: X, X, X)