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関連する概念動画

Measuring Acceleration Due to Gravity01:12

Measuring Acceleration Due to Gravity

763
Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
763
Gravimetry: Overview01:05

Gravimetry: Overview

7.0K
Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
7.0K
Gravity between Spherical Bodies01:27

Gravity between Spherical Bodies

8.7K
Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers.
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
8.7K
Finding the Center of Gravity01:03

Finding the Center of Gravity

3.9K
The center of gravity of a body is an imaginary point where the body's total weight is assumed to be concentrated, and the body is perfectly balanced. The center of the mass of a body is a point at which the whole of the mass of the body appears to be concentrated. If the acceleration due to gravity, g, has the same value at all points on a body, its center of gravity is identical to its center of mass. The center of gravity of homogeneous bodies such as a sphere, cube, or rectangular plate...
3.9K
Variation in Acceleration due to Gravity near the Earth's Surface01:20

Variation in Acceleration due to Gravity near the Earth's Surface

2.5K
An object's apparent weight is its weight measured by a spring balance at its location. It is different from its true weight, the force with which the Earth pulls it, because of the Earth's rotation. Mathematically, an object's apparent weight equals its true weight minus the centripetal force that keeps it in a circular motion along with the Earth's surface every 24 hours.
The difference between the true and apparent weights is proportional to the square of the Earth's...
2.5K
Precipitation Gravimetry01:03

Precipitation Gravimetry

7.9K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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関連する実験動画

Updated: Oct 2, 2025

Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology
13:59

Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology

Published on: November 13, 2014

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重力地図の量子センシング

Ben Stray1, Andrew Lamb1, Aisha Kaushik1

  • 1Midlands Ultracold Atom Research Centre, School of Physics and Astronomy, University of Birmingham, Birmingham, UK.

Nature
|February 24, 2022
PubMed
まとめ
この要約は機械生成です。

新しい量子重力グラデーションセンサは 地質学的調査の限界を克服します この実用的な機器は 地下の特徴を素早くマッピングし,様々な用途で詳細な地表探査を可能にします.

さらに関連する動画

Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
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Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics

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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

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関連する実験動画

Last Updated: Oct 2, 2025

Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology
13:59

Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology

Published on: November 13, 2014

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Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
07:42

Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics

Published on: February 19, 2017

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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

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科学分野:

  • 地質学と量子センシング

背景:

  • 重力感知は地質学,気候研究,地質学に不可欠です
  • 現在の重力地図は,騒音削減のための長い測定時間によって制限され,地下特有のメータースケールの解像度を阻害しています.

研究 の 目的:

  • 既存の方法の限界を克服する 実践的な量子重力グラデーションセンサを開発する.
  • 高解像度の地下調査で センサーの能力を実証するためです

主な方法:

  • 地震,レーザー,熱,磁気,傾きノイズを抑制する 量子重力グラデーションセンサを設計した
  • 統計的不確実性は20E (20x10−9s−2) となる.
  • 空間解像度0.5メートルの調査を 8.5メートルの線で実施し 2メートルのトンネルを検出しました

主要な成果:

  • 信号と騒音の比率8で 2メートルのトンネルを検出しました
  • トンネルの中心を水平に ±0.19メートルと深さ (1.89 -0.59/+2.3) メートルでベイズ推論を用いて決定した.
  • 振動騒音の減少が直接的にマッピング時間の短縮につながることを実証しました.

結論:

  • 開発された量子重力グラデーションセンサは 実践的な高解像度地下のマッピングを提供します
  • センサーの機能は水層モニタリング,考古学,インフラ開発など様々な用途に適しています.
  • この技術は地下探査とリスク評価に 新しいアプローチを提供します