这个说法看来比较像

所有跟贴·加跟贴·新语丝读书论坛

送交者: 过客1234 于 2009-07-22, 10:24:48:

回答: 不像镀铅的黄铜球，镀黄铜的铅球还差不多 由 过客1234 于 2009-07-22, 10:11:21:

http://www.cleonis.nl/physics/phys256/foucault_pendulum_intro.php

引用：
Foucault's third pendulum was build in the Pantheon in Paris. It had a 67 meter wire, and the 16 centimeter diameter bob was a spherical brass shell filled with lead



所有跟贴:

加跟贴

笔名: 密码: 注册笔名请按这里

标题:

内容: (BBCode使用说明)