cover of episode Chasing the Impossible: The Enigma of Perpetual Motion (Encore)

Chasing the Impossible: The Enigma of Perpetual Motion (Encore)

2025/1/15
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专注于电动车和能源领域的播客主持人和内容创作者。
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@主持人 :我将讨论永动机的历史、设计原理以及为什么它是物理上不可能实现的。从12世纪印度数学家Bhaskara II设计的Bhaskara轮开始,人们就一直在尝试制造永动机。Bhaskara轮的设计理念是利用重力使轮子持续旋转,但实际上它无法克服摩擦力和空气阻力。此后,许多人,包括达芬奇,都设计过类似的装置,但都失败了。17世纪的一些装置,例如Cornelius Drebbel的永动钟和Robert Boyle的永动瓶,实际上是依靠大气压变化或虹吸效应运作,并非真正的永动机。18世纪初,Johann Bessler声称制造了超过300台永动机,但最终被认为是欺诈。19世纪以后,人们对永动机的认识更加清晰,美国专利局也停止了批准永动机专利。 永动机之所以不可能,是因为它违反了热力学定律。热力学第一定律(能量守恒定律)指出,能量既不能被创造也不能被消灭,只能从一种形式转化为另一种形式。因此,不可能存在一个制造能量的装置。许多看似永动机的装置实际上都依靠外部能量运作,例如奥塔哥大学的Beverly钟,它依靠大气压变化运作。热力学第二定律(熵增定律)指出,任何系统都会存在能量损失,例如摩擦力和空气阻力,最终导致永动机无法运作。虽然可以提高永动机的效率,例如通过真空环境和低摩擦材料,但无法完全消除能量损失。 总而言之,由于热力学定律,永动机永远不可能实现。尽管如此,仍然有人声称制造成功,但这些说法通常缺乏科学依据。

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This chapter introduces the concept of a perpetual motion machine and its supposed ability to provide unlimited energy. It also mentions the impossibility of building such a machine despite historical attempts and ongoing claims. Sponsorships for Quince and Mint Mobile are included.
  • Perpetual motion machines are devices that can continuously operate without external energy.
  • Their creation is physically impossible.
  • People have been trying to create them for almost a thousand years.
  • Mint Mobile offers affordable mobile plans.
  • Quince provides high-quality clothing and home goods.

Shownotes Transcript

Imagine a device that could supply an unlimited amount of energy. It would solve many of the world’s problems in one fell swoop. 

Unfortunately, such a device is impossible to build, but that hasn’t stopped people throughout history from trying. 

In fact, to this very day, people still claim that they have created perpetual motion machines, and they keep getting proven wrong.

Learn more about perpetual motion machines, or the lack thereof, on this episode of Everything Everywhere Daily.

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