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Videos de Conceptos Relacionados

Maxwell-Boltzmann Distribution: Problem Solving01:20

Maxwell-Boltzmann Distribution: Problem Solving

Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
Heat Flow and Specific Heat01:12

Heat Flow and Specific Heat

Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is the kilocalorie...
Conduction, Convection and Radiation: Problem Solving01:20

Conduction, Convection and Radiation: Problem Solving

There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
Heat Capacities of an Ideal Gas III01:25

Heat Capacities of an Ideal Gas III

The number of independent ways a gas molecule can move along straight line, rotate, and vibrate is called its degrees of freedom. Supposing d represents the number of degrees of freedom of an ideal gas, the molar heat capacity at constant volume of an ideal gas in terms of d is
Heat Capacities of an Ideal Gas II01:23

Heat Capacities of an Ideal Gas II

For a system that undergoes a thermodynamic process at a constant volume condition, the heat absorbed is used only to increase the system's internal energy and not for doing any kind of work. While for a system undergoing a thermodynamic process under a constant pressure condition, the amount of heat absorbed is used not only for increasing the internal energy (as a function of temperature) but also for doing some work. The molar heat capacity is the amount of heat required to increase the...
Heating and Cooling Curves02:44

Heating and Cooling Curves

When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...

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Video Experimental Relacionado

Updated: Jul 12, 2026

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
13:27

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface

Published on: June 8, 2015

El presupuesto de calor de la piscina caliente y el forzamiento de la nube de onda corta: ¿una física que falta?

V Ramanathan, B Subasilar, G J Zhang

    Science (New York, N.Y.)
    |January 27, 1995
    PubMed
    Resumen

    Las nubes sobre la piscina cálida del Pacífico occidental reducen significativamente la radiación solar de la superficie del mar al reflejar y atrapar el calor. Este hallazgo tiene importantes implicaciones climáticas, desafiando los modelos de transporte de calor oceánico existentes.

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    Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
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    Published on: April 10, 2017

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    Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
    13:27

    Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface

    Published on: June 8, 2015

    Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
    07:32

    Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

    Published on: April 10, 2017

    Área de la Ciencia:

    • Oceanografía La oceanografía es la oceanografía.
    • Ciencias de la atmósfera Ciencias atmosféricas.
    • Ciencias del clima Ciencias del clima Ciencias del clima

    Sus antecedentes:

    • Las observaciones de buques y los modelos oceánicos revelan una mínima exportación de calor de la capa mixta de la piscina cálida del Pacífico occidental (<20 W/m2).
    • Comprender los efectos radiativos de las nubes es crucial para un modelado climático preciso.

    Objetivo del estudio:

    • Para deducir el impacto de las nubes en la radiación solar neta en la superficie del mar en la piscina cálida del Pacífico occidental.
    • Para investigar la discrepancia entre el forzamiento de nubes de onda corta inferido y el observado.

    Principales métodos:

    • Utilizó observaciones de buques y datos de modelos oceánicos para cálculos de exportación de calor.
    • Forzamiento inferido de nubes de onda corta basado en el balance energético de la superficie del mar.

    Principales resultados:

    • El forzamiento inferido de la nube de onda corta fue sustancial (~ -100 W/m2), 1,5 veces el valor observado en la parte superior de la atmósfera.
    • Las nubes parecen reducir la radiación solar de la superficie del mar tanto por su reflexión como por su significativa absorción atmosférica.

    Conclusiones:

    • Las propiedades radiativas de las nubes sobre la piscina caliente difieren de las hipótesis típicas del modelo.
    • El exceso de absorción de nubes tiene implicaciones significativas para el transporte de calor del océano de los trópicos a los extratrópicos.