[HN Gopher] 2+1=4, by quinoa ___________________________________________________________________ 2+1=4, by quinoa Author : efavdb Score : 72 points Date : 2020-07-03 21:17 UTC (1 hours ago) (HTM) web link (www.efavdb.com) (TXT) w3m dump (www.efavdb.com) | ChrisKnott wrote: | I always liked this problem... | | What packs more efficiently in a barrel; tennis balls, marbles, | or a mixture of tennis balls and marbles? | | It feels like the smaller marbles are denser but obviously they | actually pack the same efficiency as the tennis balls or any | other sphere, the mixture packs more efficiently. | Kednicma wrote: | Yes. I really like the metallurgy version: An alloy can be | denser than pure elements. | jld wrote: | I was just talking to a friend about how 1 part water plus 1 | part ethanol becomes 1.92 parts solution. | | This raised a question for me that I have yet to | research/answer. Maybe one of you knows... if the above | solution is 50% ABV, what happens if I add one more part | alcohol to the solution? Is it now 66.6% ABV? More? Less? How | does ABV take into account the fact that this solution is | packed together tighter than its constituent parts? | tedunangst wrote: | The wikipedia article has all the charts and formulas you | need. https://en.wikipedia.org/wiki/Alcohol_by_volume | | (To make the above solution 50% abv, btw, you need to keep | adding water until it's 2 (liters, whatever) total volume.) | koolba wrote: | This is why baking instructions are done with weight, not volume. | hirundo wrote: | .2+.33=8, by popcorn | lostlogin wrote: | It's winter here - I'm pretty sure that firewood bought by | "thrown" volume uses the same maths. You stack it and it all | vanished. | PopeDotNinja wrote: | I wonder if the mass stays roughly the same. | brianberns wrote: | It loses a little mass due to water boiling off, but other than | that the mass has to stay exactly the same (barring nuclear | reactions, which typically don't make for good quinoa). | gus_massa wrote: | It's an interesting observation. Can you add some close up photos | of the quinoa grains before and after cooking? (With something | that does not change of size, for scale.) | efavdb wrote: | thanks for your comment and suggestion. unfortunately we ate it | all, but I'll try to add such a picture next time. The truth is | that they aren't exactly spherical, but squished in on one | side. | lostlogin wrote: | Eating ones own workings is a new take on "the dog ate my | homework". ___________________________________________________________________ (page generated 2020-07-03 23:00 UTC)