arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1508.00538physics.ed-ph
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拉伸橡胶,拉伸思维:用于熵教学的聚合物物理实验室

Stretching Rubber, Stretching Minds: a polymer physics lab for teaching entropy

Theodore A. Brzinski, Karen E. Daniels

摘要:

熵是一个很难用真实世界的例子来教授的概念。与温度、压强、体积或功不同,它不是大多数学生在日常生活中遇到的量。甚至熵通常被定性地描述为无序的度量,也是不完整的,可能会产生误导。为了解决这些障碍,我们开发了一个简单的实验室活动,拉伸弹性橡胶片,旨在让学生亲身体验绝热和准静态过程中熵,温度和功的概念。我们提出了两个版本的设备:一个双杠杆系统,这可能是以相对较小的成本复制,和商业材料测试系统,这为学生提供了经验,在研究中使用的科学仪器。

英文摘要:

Entropy is a difficult concept to teach using real-world examples. Unlike temperature, pressure, volume, or work, it's not a quantity which most students encounter in their day-to-day lives. Even the way entropy is often qualitatively described, as a measure of disorder, is incomplete and can be misleading. In an effort to address these obstacles, we have developed a simple laboratory activity, the stretching of an elastic rubber sheet, intended to give students hands-on experience with the concepts of entropy, temperature and work in both adiabatic and quasistatic processes. We present two versions of the apparatus: a double-lever system, which may be reproduced with relatively little cost, and a commercial materials testing system, which provides students experience with scientific instrumentation that is used in research.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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