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相关概念视频

States of Water01:23

States of Water

50.9K
Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
50.9K
The Water Cycle01:00

The Water Cycle

24.5K
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
24.5K
Water: A Bronsted-Lowry Acid and Base02:30

Water: A Bronsted-Lowry Acid and Base

50.7K
The reaction between a Brønsted-Lowry acid and water is called acid ionization. For example, when hydrogen fluoride dissolves in water and ionizes, protons are transferred from hydrogen fluoride molecules to water molecules, yielding hydronium ions and fluoride ions:
50.7K
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

28.1K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
28.1K
Role of Water in Human Biology01:27

Role of Water in Human Biology

8.6K
Water is the one of the most significant components of the human body; it plays a crucial role in several physiological activities because of its unique physicochemical properties. Importantly, it helps to regulate body temperature and is the chief component of several body fluids.
Water's Solvent Properties
Since water is a polar molecule with slightly positive and slightly negative charges, ions and polar molecules can readily dissolve in it. Therefore, it is referred to as a solvent, a...
8.6K
Cohesion01:07

Cohesion

54.4K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
54.4K

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相关实验视频

Updated: Jul 18, 2025

Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine
08:16

Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine

Published on: March 13, 2017

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在水中写字.

Nadir Möller1, Lukas Hecht2, Ran Niu1,3

  • 1Institut für Physik, Johannes Gutenberg Universität, Staudinger Weg 7, 55128, Mainz, Germany.

Small (Weinheim an der Bergstrasse, Germany)
|August 21, 2023
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的流体写作技术,使用环状颗粒作为墨水. 这种方法使得可重新配置的线条和图案可以在没有固体表面的情况下直接在水中绘制.

关键词:
组装的组装组装的组装.合物 合物 合物微米尺度上的微米尺度微型游泳者 微型游泳者透流是指透的流.

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Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
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Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

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Design and Fabrication of an Optical Fiber Made of Water
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Design and Fabrication of an Optical Fiber Made of Water

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相关实验视频

Last Updated: Jul 18, 2025

Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine
08:16

Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine

Published on: March 13, 2017

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Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
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Design and Fabrication of an Optical Fiber Made of Water
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Design and Fabrication of an Optical Fiber Made of Water

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科学领域:

  • 流体动力学 流体动力学
  • 材料科学是一种材料科学.
  • 微观尺度的图案设计

背景情况:

  • 传统的书写依赖于固体表面和固定的墨水.
  • 由于液体介质,水下写作带来了独特的挑战.

研究的目的:

  • 展示一种在液体介质上写作和绘画的新方法.
  • 探索体颗粒组装成可重新配置的线条和图案.
  • 调查基于流体的写作的基本原则.

主要方法:

  • 使用离子交换珠作为"笔"收集沉积的体颗粒 ("墨水").
  • 使用重力和基板倾斜来引导笔和形状线.
  • 开发一个最小的物理模型来预测写作行为.

主要成果:

  • 在水中使用体粒子组装成功写出线条,字母和复杂的图案.
  • 证明书面线条是持久的,具有高对比度,并且可以完全重新配置.
  • 验证了流体写入参数的预测模型.

结论:

  • 这种新的方法为写作,绘画和图案流体提供了一种多功能方法.
  • 这种技术即使在微观尺度上也是有效的.
  • 它绕过了对固体基板和永久固定的需求.