Re: Snowflakes
Quote:
Originally Posted by TheDaddy
(Post 35770083)
That's about the only bit of you that still works :)
---------- Post added at 06:59 ---------- Previous post was at 06:58 ----------
Sad indeed, he just wanted us all to be a little bit wiser and bask in his colossal intellect, if only he'd stuck around we'd all know about snowflakes and Maggy would know by now if they really were that unique
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Well they possibly are, the structure of the water molecule greatly favours ice crystals forming a hexagonal lattice structure (although twelve-sided snowflakes have sometimes been observed). The six 'arms' of this structure grow independently and chaotically and indeed only a fraction of snowflakes are actually symmetrical. Because this growth is completely random then it is not likely that two snowflakes would grow in identical manners. - but it is certainly not a rule that all snowflakes have to be dissimilar.
Going back to the 'largest snowflake' postings from earlier in this thread, there is no evidence that this 15 inch snowflake ever existed - it was just a claim that someone reported seeing one of that size. The largest properly measured and recorded snowflakes are more like 2-3 inches across. It is unlikely (but not impossible) that a snowflake could grow to 15 inches across, they are quite delicate structures and it is more probable that wind shear as they descend would break them up.
Lastly the density of a snowflake drops rapidly with diameter. The OP's 'generous' estimate of 50% air is nothing like it. The actual mass of a hypothetical 15 inch snowflake would be a small fraction of what he though it would be and its terminal velocity (another topic which there seemed to be a bit of confusion about) would be higher than normal snowflakes but not greatly so.
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