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関連する概念動画

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The Cartesian form for vector formulation is a process to calculate  the moment of force using the position and force vectors. The moment of force is defined as the cross-product of these vectors, making it a vector quantity. The Cartesian form of the position and force vectors involves unit vectors, which can be used to express the cross-product in determinant form.
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James Clerk Maxwell (1831–1879) was one of the significant contributors to physics in the nineteenth century. He is probably best known for having combined existing knowledge of the laws of electricity and the laws of magnetism with his insights to form a complete overarching electromagnetic theory, represented by Maxwell's equations. The four basic laws of electricity and magnetism were discovered experimentally through the work of physicists such as Oersted, Coulomb, Gauss, and...
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自発的に形成された岩底の滝

Joel S Scheingross1,2,3, Michael P Lamb4, Brian M Fuller4

  • 1Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA. jscheingross@unr.edu.

Nature
|March 15, 2019
PubMed
まとめ
この要約は機械生成です。

滝は,外部のトリガーなしで,均一な岩床から自然に形成されます. 水流の不安定さや堆積物や侵食が これらの地形を作り出し 景観の進化に新たな洞察を与えてくれます

さらに関連する動画

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科学分野:

  • 地形学
  • 地球科学
  • 水学

背景:

  • 滝は岩床の切断を通して景観の進化に影響を与える重要な地形です.
  • 海平面や地質学的な変化の指標として機能し,下流のプロセスを妨害する可能性があります.

研究 の 目的:

  • 制御された条件下で平らな岩床からの滝の固有の形成を調査する.
  • 外部からの干渉が 滝の発生に必要かどうかを判断する.

主な方法:

  • 一定の水放出と沈殿物の供給で流水実験が行われました.
  • この実験では,平らで均質な岩床を用いて地形を観察した.

主要な成果:

  • 滝は当初平らな岩床から自発的に形成された.
  • 流れの水力学,堆積物輸送,岩床の侵食の間の不安定は,滝へと進化した波形状の形成につながった.

結論:

  • 滝の形成は,外部要因ではなく,内部システムダイナミクスによって引き起こされる本質的なプロセスです.
  • 自発的に形成された滝と,外部から強制された滝を区別することで,景観から地球の歴史を再構築する精度を高めることができます.