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

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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2024-05-18

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

图书描述

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