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関連する概念動画

Applications of Integration to Find Hydrostatic Pressure01:30

Applications of Integration to Find Hydrostatic Pressure

103
Hydrostatic force is a fluid's total force at rest on a surface. For a horizontal surface submerged at a fixed depth, the pressure is constant and calculated as the product of fluid density, gravitational acceleration, and depth. In the case of a vertical dam wall submerged in water, this force is not evenly distributed due to the increasing pressure with depth. This variation arises from the cumulative weight of the water above each point. Integration is used to account for the continuous...
103
Hydrostatic Pressure Force on a Plane Surface01:04

Hydrostatic Pressure Force on a Plane Surface

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When a plane surface is submerged in a fluid, hydrostatic forces develop on the surface due to the fluid's pressure. For horizontal surfaces, the pressure exerted by the fluid is uniform because the depth remains constant. The resultant force is determined by the pressure at the given depth multiplied by the area of the surface, and it acts through the centroid of the surface. For vertical surfaces, the pressure varies with depth, increasing as the distance from the fluid's free surface...
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Hydrostatic Pressure Force on a Curved Surface01:04

Hydrostatic Pressure Force on a Curved Surface

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Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
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Radical Reactivity: Steric Effects01:10

Radical Reactivity: Steric Effects

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The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
2.5K
Directing and Steric Effects in Disubstituted Benzene Derivatives01:18

Directing and Steric Effects in Disubstituted Benzene Derivatives

4.0K
When disubstituted benzenes undergo electrophilic substitution, the product distribution depends on the directing effect of both substituents. When the directing effects of both substituents reinforce each other, a single product is obtained. For example, bromination of p-nitrotoluene occurs ortho to the methyl group and meta to the nitro group, which is the same position, resulting in a single product. However, if the directing effects of the two groups oppose each other, the...
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Vapor Pressure02:34

Vapor Pressure

41.1K
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
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Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique
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水圧下でのステリック制御メカノケミスト

Hao Yan1,2, Fan Yang1,3, Ding Pan4,5,6

  • 1Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.

Nature
|February 23, 2018
PubMed
まとめ
この要約は機械生成です。

研究 者 たち は,水圧 を 用い て 化学 反応 を 引き起こす ため の "分子 " を 開発 し まし た. この画期的な発見により 圧縮下での機械化学が可能になり 特定の材料の合成と化学的変換に 新たな道が開かれました

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関連する実験動画

Last Updated: Feb 14, 2026

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique
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科学分野:

  • 材料科学
  • 化学について
  • 機械化学

背景:

  • 機械的刺激は化学反応の経路を変化させ,従来の化学を補完する合成戦略を提供します.
  • 以前の機械化学の研究は,牽引力または直角力に焦点を当て,水立圧下での応用を制限しました.

研究 の 目的:

  • イソトロピック圧縮 (水立圧) によって駆動されるメカノ化学を実証する.
  • 結合活性化のために同位体のストレスを 無位体のストレスを変換する 分子構造を設計する.

主な方法:

  • 機械的に異質な成分を持つ構造の分子工学 (圧縮可能なメカノフォールと圧縮できないリガンド).
  • 同位体ストレス下でのアニゾトロプ的変形を誘導するために"分子"を使用します.
  • 実験的アプローチと 計算的アプローチを組み合わせたものです

主要な成果:

  • 金属有機カルコゲン化物における水立圧による酸化還元反応が実証されている.
  • 分子アンビルによって誘発されるアニゾトロプ的ストレスを介して金属カルコゲン結合の活性化を示した.
  • 結合角の曲折または鎖切断による圧力誘発による元素の形成を観察した.

結論:

  • メカノケミストリーは,異質な圧縮性を持つ分子を設計することによって,同位圧縮下で達成可能である.
  • 分子は,水立圧を特定の結合活性化に変換するメカニズムを提供します.
  • この研究は新しい反応機構を明らかにし,高特異性メカニズム合成のための戦略を提案する.