猫摇晃脑袋时，一秒能来回几下？ vincent Ma，结构工程师 也许我是太无聊了，一番搜索后竟然找到了答案。 哺乳动物甩动皮毛脱水的频率与两个因素相关，一是动物的体型大小，二是水的物理特性。 猫的甩动频率大概在 10hz 左右。（2014/02/11 重新看图发现数值有误，应为 10Hz 左右） 原文中没有注明是身体甩动还是头部甩动。 … But mammals of all shapes and sizes employ the quick-shake tactic to dry themselves. Now, a team of researchers has used high-speed video and fur particle tracking to understand the common physical characteristics that unite the wet-shakes of 33 animals from 16 species. The researchers, led by Georgia Institue of Technology biologist David Hu, demonstrate that whether it's a mouse, a goat, a dog or a bear, the shake of a wet mammal is anything but random. On the contrary, the researchers write that the frequency of an animal's shake — i.e., the number of times it oscillates its body per second — is tuned to "(i) the animal's size and (ii) the properties of water, namely surface tension and density," in order to remove as much water as possible with minimal physical effort. 图片地址： 原文地址： High speed videography reveals the mystery of the wet-dog shake 查看知乎原文
