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What is Climate?01:16

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
Gravity between Spherical Bodies01:27

Gravity between Spherical Bodies

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...
Acceleration due to Gravity on Earth01:21

Acceleration due to Gravity on Earth

According to Newton's law of gravitation, the gravitational force on a body is proportional to its mass. According to Newton's second law of motion, the acceleration produced by an external force is inversely proportional to the force. Hence, the acceleration of an object under an external force of gravitation is independent of its mass.
The acceleration of an object close to the Earth, because of the Earth's gravitational pull, is called the acceleration due to gravity. It is always directed...
Variation in Acceleration due to Gravity near the Earth's Surface01:20

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

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 angular speed. Since the...
Acceleration due to Gravity on Earth00:55

Acceleration due to Gravity on Earth

Newton's second law is closely related to his first law of motion. It mathematically gives the cause-and-effect relationship between force and changes in motion. Newton's second law is quantitative and is used extensively to calculate what happens in situations involving a force. All external forces acting on a system add together to produce a net force Fnet. A larger net external force produces a larger acceleration. This acceleration is directly proportional to, and in the same direction as,...
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...

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Video Experimental Relacionado

Updated: Jun 26, 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

Oscilaciones resonantes entre la tierra sólida y la atmósfera.

Nishida1, Kobayashi, Fukao

  • 1Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan. Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan.

Science (New York, N.Y.)
|March 24, 2000
PubMed
Resumen

La Tierra La Tierra La Tierra La Tierra La Tierra

Área de la Ciencia:

  • La geofísica es la geofísica.
  • Sismología Sismología Sismología.
  • La acústica atmosférica es la acústica atmosférica.

Sus antecedentes:

  • Oscilaciones libres continuas de la Tierra detectadas en el ruido sísmico.
  • Estas oscilaciones ocurren en la banda de frecuencias de ondas superficiales de largo período.

Objetivo del estudio:

  • Investigar la variación anual en las oscilaciones libres de la Tierra.
  • Determinar la fuente de excitación de estas oscilaciones sísmicas.

Principales métodos:

  • Análisis de los datos de ruido sísmico del suelo.
  • Análisis de correlación entre las oscilaciones sísmicas y los fenómenos atmosféricos.

Principales resultados:

  • Evidencia de una variación anual en las oscilaciones libres de la Tierra.

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  • Resonancia observada entre las oscilaciones acústicas sísmicas y atmosféricas.
  • Indicación de que la fuente de excitación está en o cerca de la superficie de la Tierra.

    • Conclusiones:

    • La fuente de excitación de las oscilaciones libres de la Tierra es externa a la Tierra sólida.
    • Las oscilaciones acústicas atmosféricas probablemente juegan un papel en las excitantes oscilaciones sísmicas libres.