Are Colloids Solid or Liquid and What Modulus is Used to Measure Them?

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Discussion Overview

The discussion revolves around the classification of colloids as either solid or liquid, and the appropriate modulus to measure them. Participants explore the nature of colloids, their characteristics, and the physics involved in their measurement.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants suggest that colloids are not strictly solids or liquids, but rather a classification of mixtures, primarily consisting of a liquid with solid particles dispersed within it.
  • One participant proposes that the bulk modulus might be the appropriate measure for colloids, with potential minor corrections needed.
  • Another participant describes colloids as mixtures of gases with solids or liquids, noting that the visibility of a light beam passing through a colloid can indicate its presence.
  • Examples of colloids, such as fog, smoke, and mayonnaise, are provided to illustrate the concept.
  • There is a question raised about the stability of colloids, with a participant asserting that colloids do not sediment and are stable mixtures of substances in different phases.

Areas of Agreement / Disagreement

Participants express differing views on the classification of colloids and the appropriate modulus for measurement. The discussion remains unresolved, with multiple competing perspectives presented.

Contextual Notes

Some claims about the nature of colloids depend on definitions and may involve assumptions about stability and phase interactions that are not fully explored.

elaine216@hotmail.co
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are they solid/ liquid?
bulk modulus or shear modulus to be used?
 
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I don't know. What?
 
hmmm they are not a solid or a liquid. It's a classification of a mixture, not the state of the substance. Thus, a collid is mostly comprised of a liquid, while it has solid particle actually dispersed in it, no in the liquid form.

Now with moduls to use...that's a pure physics question and not certain. I would imagine it would be bulk, with some minor corrections.

pete

(you know that most water in the ocean and our rivers are colloids)
 
A colloid is a mixture of a gas with a solid or liquid dispersed in it. (FOG) Also a liquid with solid dispersed. If you can shine a beam of light through it and see the beam it is a colloid.
 
PeteGt said:
(you know that most water in the ocean and our rivers are colloids)
Are they? Colloids don't sediment. It is supposed to be a stable mixture of substances in different phases.
 
Whats the scientific term for colloids?
 

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