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Videos de Conceptos Relacionados

First Law: Particles in One-dimensional Equilibrium01:10

First Law: Particles in One-dimensional Equilibrium

Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If we...
First Law: Particles in Two-dimensional Equilibrium01:18

First Law: Particles in Two-dimensional Equilibrium

Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about the...
Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision02:43

Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision

The ideal-gas equation, which is empirical, describes the behavior of gases by establishing relationships between their macroscopic properties. For example, Charles’ law states that volume and temperature are directly related. Gases, therefore, expand when heated at constant pressure. Although gas laws explain how the macroscopic properties change relative to one another, it does not explain the rationale behind it.
States of Matter01:20

States of Matter

Solids, liquids, and gases are the three states of matter commonly found on Earth. A solid is rigid and possesses a definite shape. A liquid flows and takes the shape of its container, except it forms a flat or slightly curved upper surface when acted upon by gravity. Both liquid and solid samples have volumes nearly independent of pressure. A gas takes both the shape and volume of its container.
Scientists have discovered a fourth state of matter, plasma, that occurs naturally in the interiors...
Kinetic Theory of an Ideal Gas01:12

Kinetic Theory of an Ideal Gas

A mole is defined as the amount of any substance that contains as many molecules as there are atoms in exactly 12 grams of carbon-12. An Italian scientist Amedeo Avogadro (1776–1856) formed the  hypothesis that equal volumes of gas at equal pressure and temperature contain equal numbers of molecules, independent of the type of gas. Later, the hypothesis was developed to form the SI unit for measuring the amount of any substance.
The number of molecules in one mole is called Avogadro's number...
The Principle of Superposition and the Gravitational Field01:17

The Principle of Superposition and the Gravitational Field

The principle of superposition applies to gravitational forces of objects that are sufficiently far apart. It states that the net gravitational force on a point object is the vector sum of the gravitational forces on it due to various objects. The principle helps calculate the force by listing the individual forces and then vectorially summing them up. However, it should be noted that the principle of superposition is not always apparent. In the presence of a second force, the first force could...

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Video Experimental Relacionado

Updated: Jul 11, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Física del estado granular.

H M Jaeger, S R Nagel

    Science (New York, N.Y.)
    |March 20, 1992
    PubMed
    Resumen

    Los materiales granulares exhiben comportamientos únicos, desafiando la simple clasificación sólida o líquida. Su compleja física, observada en pilas de arena, inspira nuevas teorías y experimentos, trazando paralelismos con los sistemas microscópicos.

    Área de la Ciencia:

    • Física Física es la física de las cosas.
    • Ciencia de los materiales Ciencia de los materiales.
    • Sistemas complejos de sistemas complejos.

    Sus antecedentes:

    • Los materiales granulares presentan propiedades físicas únicas, que desafían las clasificaciones tradicionales de sólido/líquido.
    • Su comportamiento requiere nuevos marcos teóricos y enfoques experimentales.

    Objetivo del estudio:

    • Para explorar la compleja física de los materiales granulares.
    • Para resaltar las analogías entre los sistemas granulares y los fenómenos microscópicos.
    • Para introducir una nueva era en la investigación de sistemas granulares.

    Principales métodos:

    • Observación de la física de los montones de arena.
    • Modelado teórico del comportamiento granular.

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  • Análisis comparativo con sistemas microscópicos (superconductores, gafas de espín).

    • Principales resultados:

    • Los materiales granulares exhiben comportamientos distintos de los de la materia convencional.
    • Se validan las analogías trazadas entre simples pilas de arena y complejos sistemas microscópicos.
    • Han surgido nuevas vías teóricas y experimentales para la física granular.

    Conclusiones:

    • El estudio subraya la naturaleza distinta de la materia granular.
    • Las analogías con los sistemas microscópicos proporcionan valiosos conocimientos sobre la física granular.
    • Los avances recientes anuncian una nueva fase de investigación en sistemas granulares.