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相关概念视频

Magnetic Force01:18

Magnetic Force

915
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
915
Three-Dimensional Force System01:30

Three-Dimensional Force System

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In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
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Two-Dimensional Force System01:20

Two-Dimensional Force System

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A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
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Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
3.4K
Non-conservative Forces01:17

Non-conservative Forces

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Non-conservative forces are dissipative forces such as friction or air resistance. These forces take energy away from a system as it progresses. Unlike conservative forces, non-conservative forces do not have potential energy associated with them. This is because the energy is lost to the system and cannot be turned into useful work later.
Also unlike their conservative counterparts, they are path-dependent; where the object starts and stops does matter. For example, a grinding wheel applies a...
7.6K
Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

651
A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
651

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相关实验视频

Updated: Jun 11, 2025

Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping
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Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping

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奎克顿纽顿局部力传感器

Yann Balland1, Luc Absil1, Franck Pereira Dos Santos1

  • 1LNE-<a href="https://ror.org/03tdef037">SYRTE</a>, Observatoire de Paris, <a href="https://ror.org/013cjyk83">Université PSL</a>, CNRS, <a href="https://ror.org/02en5vm52">Sorbonne Université</a>, 61 avenue de l'Observatoire, 75014 Paris, France.

Physical review letters
|September 27, 2024
PubMed
概括

我们开发了一种使用原子干涉测量的量子传感器,以高精度测量原子表面的力. 这种传感器检测到卡西米尔-波尔德力,一个微妙的量子效应,尽管有实验挑战.

科学领域:

  • 量子物理学的量子物理学
  • 原子物理 原子物理
  • 表面科学是一门科学.

背景情况:

  • 原子表面相互作用在纳米科学和技术中至关重要.
  • 在小距离上测量弱力在实验上具有挑战性.
  • 卡西米尔-波尔德力是原子与表面之间的基本量子电动力学相互作用.

研究的目的:

  • 实现量子传感器,精确测量原子表面相互作用.
  • 为了实现亚微米对原子表面分离的控制.
  • 为了检测和证据卡西米尔-波尔德力量.

主要方法:

  • 在光学网格中利用被困原子干扰度.
  • 实现对平均原子-表面分离距离的亚微米控制.
  • 在0-300μm范围内执行力测量.

主要成果:

  • 在1秒内达到3.4×10−28N的短期力灵敏度.
  • 证明了4aN (4×10−30 N) 的长期力稳定性.
  • 获得了卡西米尔 - 波尔德力的证据,尽管吸附原子的流浪力.

结论:

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  • 开发的量子传感器可以精确测量原子表面相互作用.
  • 传感器的灵敏度和稳定性允许检测基本量子力.
  • 这项工作为纳米级力量和量子现象的先进研究铺平了道路.