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Le Chatelier's Principle: Changing Concentration02:27

Le Chatelier's Principle: Changing Concentration

A system at equilibrium is in a state of dynamic balance, with forward and reverse reactions taking place at equal rates. If an equilibrium system is subjected to a change in conditions that affects these reaction rates differently (a stress), then the rates are no longer equal and the system is not at equilibrium. The system will subsequently experience a net reaction in the direction of a greater rate (a shift) that will re-establish the equilibrium. This phenomenon is summarized by Le...
Le Chatelier's Principle: Changing Temperature02:19

Le Chatelier's Principle: Changing Temperature

Consistent with the law of mass action, an equilibrium stressed by a change in concentration will shift to re-establish equilibrium without any change in the value of the equilibrium constant, K. When an equilibrium shifts in response to a temperature change, however, it is re-established with a different relative composition that exhibits a different value for the equilibrium constant.
To understand this phenomenon, consider the elementary reaction:
Transformation01:26

Transformation

Microbial communities are dynamic environments where cell lysis releases free DNA into the surroundings. Other cells can take up this extracellular DNA through a process known as transformation.When a cell incorporates this foreign DNA into its genome, resulting in genetic modification, the process is known as transformation. Cells capable of this process are termed competent. Competence can be natural, as observed in certain bacteria and archaea, or artificially induced in the...
Net Change Theorem01:22

Net Change Theorem

The Net Change Theorem is a fundamental principle in calculus that establishes a direct relationship between a function’s rate of change and its accumulated change over an interval. Mathematically, it states that the definite integral of a function's derivative over a given interval [a,b] yields the net change in the original function:This theorem has significant applications in various real-world scenarios, including physics, economics, and engineering. A particularly useful application is in...
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Transformations in mathematics alter the position or orientation of a function’s graph while preserving its fundamental shape. One important type of transformation is the horizontal shift, which involves modifying the input variable within a function’s equation. This operation affects where outputs occur along the horizontal axis but does not alter the function’s overall structure.A horizontal shift is achieved by replacing the input variable x with either x + c or x - c, where c is a constant.
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Rates of Change

The rate of change is a central concept in mathematics that quantifies how one variable varies in response to another. It serves as a foundational tool in modeling dynamic systems across disciplines such as physics, biology, economics, and engineering. Understanding both average and instantaneous rates of change enables the analysis of behavior in functions that describe real-world phenomena.Average Rate of ChangeFor a function f(x) defined over an interval [x1,x2], the average rate of change...

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Related Experiment Video

Updated: Jul 12, 2026

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
12:19

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo

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Plus çà change.

J L Heilbron1, W F Bynum

  • 1Worcester College, Oxford, UK.

Nature
|December 11, 1999
PubMed
Summary

This study compares scientific predictions from the late 19th century to today. It reveals shifts in how scientific advancements and discoveries are evaluated over time.

Area of Science:

  • History of Science
  • Sociology of Science
  • Science Communication

Background:

  • The turn of the 20th century saw significant scientific predictions and commentary.
  • Interest in forecasting scientific progress is a recurring theme at century junctures.

Purpose of the Study:

  • To analyze and compare the nature of scientific predictions and evaluations of discovery made at the end of the 19th century with contemporary perspectives.
  • To identify changes in the discourse surrounding scientific advancement over a century.

Main Methods:

  • Comparative analysis of historical science commentary from the late 1800s.
  • Review of modern scientific predictions and evaluations of discovery.
  • Content analysis of prediction trends and themes.

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Related Experiment Videos

Last Updated: Jul 12, 2026

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
12:19

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Published on: July 1, 2013

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
06:53

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Published on: March 1, 2017

Quantification of Strain in a Porcine Model of Skin Expansion Using Multi-View Stereo and Isogeometric Kinematics
14:14

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Published on: April 16, 2017

Main Results:

  • Identified evolution in the scope and focus of scientific predictions.
  • Observed changes in the perceived drivers and barriers to scientific discovery.
  • Documented shifts in the optimism and tone of future-oriented scientific discourse.

Conclusions:

  • Scientific prediction and evaluation methods have evolved significantly over the past century.
  • Contemporary views on scientific advancement reflect different societal and technological contexts compared to the late 19th century.