Cats' Paws and Catapults pdf epub mobi txt 电子书 下载 2024


Cats' Paws and Catapults

简体网页||繁体网页
Steven Vogel
W. W. Norton & Company
2000-1-17
384
$ 27.06
Paperback
9780393319903

图书标签: 科學  2009讀   


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发表于2024-11-08

Cats' Paws and Catapults epub 下载 mobi 下载 pdf 下载 txt 电子书 下载 2024

Cats' Paws and Catapults epub 下载 mobi 下载 pdf 下载 txt 电子书 下载 2024

Cats' Paws and Catapults pdf epub mobi txt 电子书 下载 2024



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Nature and humans build their devices with the same earthly materials and use them in the same air and water, pulled by the same gravity. Why, then, do their designs diverge so sharply? Humans, for instance, love right angles, while nature's angles are rarely right and usually rounded. Our technology goes around on wheels-and on rotating pulleys, gears, shafts, and cams-yet in nature only the tiny propellers of bacteria spin as true wheels. Our hinges turn because hard parts slide around each other, whereas nature's hinges (a rabbit's ear, for example) more often swing by bending flexible materials. In this marvelously surprising, witty book, Steven Vogel compares these two mechanical worlds, introduces the reader to his field of biomechanics, and explains how the nexus of physical law, size, and convenience of construction determine the designs of both people and nature. "This elegant comparison of human and biological technology will forever change the way you look at each."-Michael LaBarbera, American Scientist

Cats' Paws and Catapults 下载 mobi epub pdf txt 电子书

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