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Just did some back of the envelope Wolfram Alpha calculations, and it seems to me that the Eiffel Tower is about 99.999% air. Does that constitute an even light
by jameshart 11y ago
Just did some back of the envelope Wolfram Alpha calculations, and it seems to me that the Eiffel Tower is about 99.999% air. Does that constitute an even lighter material?
Edit - Just trying to understand the moral distinction between a light 'material' and a light 'structure' here. This seems more like a structure to me?
- shas3 11y agoIt's all about the scale. Grossly speaking, on an average, Eiffel Tower is perhaps 99.999% air. But is this true at every scale? Does every cubic meter of the Eiffel Tower have 99.999% air? Or does every cubic micrometer? If we were to build a megastructure of size 1,000,000s X Eiffel-size with Eiffels as the building blocks being replicated, then perhaps the Boeing material is not super-useful. But most applications are 1,000,000s X the Boeing lattice sized.