...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Chemical Health and Safety >Friction
【24h】

Friction

机译：摩擦

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Scientists often resort to models to describe a theory. When describing angular momentum in a seminar, a physicist may say: "Imagine a spherical racecar running on a frictionless track" - preposterous. She does so without any expectation of disbelief from her audience. We slice the insolent details away from the important matter at hand, and learn. Economists do this too - they call it "ceteris paribus," or "other things being equal." Of course, other things never are equal. But, if we distill the discussion to the basic elements, sinter it in an intellectual crucible, we will find pure gold. That is not where the problem lies. The problem lies in the wind resistance of the race-car and the changes therein brought about by dynamic angles in the body. It exerts itself in the asphalt that provides the traction the car needs to propel itself down the track and tread of the tires. None of these things affect the real issue - the car has to stop turning when it gets to the straightaway - but they affect the reality, each in their own way. Truly, they are not material to the equation, but they are inseparable. They are noise.
机译：科学家经常诉诸模型来描述理论。在研讨会上描述角动量时，物理学家可能会说：“想象一下，球形赛车在无摩擦的轨道上行驶” –荒谬。她这样做并没有引起观众的怀疑。我们从眼前的重要事情中切掉那些愚蠢的细节，然后学习。经济学家也这样做-他们称其为“塞特里·帕里布斯（ceteris paribus）”或“其他条件相同”。当然，其他事情永远都不平等。但是，如果我们将讨论提炼为基本要素，然后将其烧结在知识分子的坩埚中，我们将发现纯金。那不是问题所在。问题在于赛车的风阻以及车身中的动态角度在其中引起的变化。它在沥青中发挥作用，为汽车提供了所需的牵引力，以将其自身推向轮胎的轨道和胎面。这些都不影响真正的问题-汽车直驶时必须停止转弯-但它们以各自的方式影响现实。的确，它们对方程式并不重要，但它们是密不可分的。他们是噪音。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号