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Videos de Conceptos Relacionados

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...
Gravimetry: Overview01:05

Gravimetry: Overview

Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
Acceleration due to Gravity on Other Planets01:24

Acceleration due to Gravity on Other Planets

The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
Measuring Acceleration Due to Gravity01:12

Measuring Acceleration Due to Gravity

Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
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,...
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...

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Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

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Same author

Europa's differentiated internal structure: inferences from four Galileo encounters.

Science (New York, N.Y.)·1998
Same author

Distribution of rock, metals, and ices in Callisto.

Science (New York, N.Y.)·1998
Same author

Europa's differentiated internal structure: inferences from two Galileo encounters.

Science (New York, N.Y.)·1997
Same author

Gravitational evidence for an undifferentiated Callisto.

Nature·1997
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Gravity field of venus: a preliminary analysis.

Science (New York, N.Y.)·1979
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Lunar Shape via the Apollo Laser Altimeter.

Science (New York, N.Y.)·1973

Video Experimental Relacionado

Updated: Jul 12, 2026

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Gravedad de Marte: resultados de alta resolución del orbitador vikingo 2

W L Sjogren

    Science (New York, N.Y.)
    |March 9, 1979
    PubMed
    Resumen

    El mapeo detallado de la gravedad marciana revela anomalías significativas, incluida una gran anomalía cerca de Olympus Mons. Esta investigación proporciona nuevos conocimientos sobre Marte.

    Área de la Ciencia:

    • Ciencias planetarias Ciencias planetarias.
    • La geofísica es la geofísica.

    Sus antecedentes:

    • Comprender el campo de gravedad de Marte es crucial para descifrar su historia geológica y su estructura interna.
    • Los mapas de gravedad anteriores tenían una resolución y cobertura espacial limitadas.

    Objetivo del estudio:

    • Para crear un mapa de alta resolución de la gravedad de Marte.
    • Para identificar y caracterizar las anomalías gravitacionales y su correlación con las características geológicas.

    Principales métodos:

    • Utilizó datos de seguimiento de radio Doppler de naves espaciales.
    • Generó un mapa de gravedad que cubre de 30°S a 65°N de latitud y 360° de longitud.
    • Logró una resolución de rasgos de aproximadamente 500 kilómetros.

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    Principales resultados:

    • Reveló una importante anomalía gravitatoria asociada con el Olimpo Mons.
    • Se identificó un mascon (concentración de masa) en Isidis Planitia.
    • Correlacionó otras anomalías con estructuras volcánicas conocidas.

    Conclusiones:

    • El nuevo mapa de gravedad proporciona detalles sin precedentes de las variaciones gravitacionales marcianas.
    • Las anomalías identificadas, particularmente cerca de Olympus Mons, ofrecen información sobre los procesos de la corteza y el manto del planeta.
    • El modelado de Olympus Mons sugiere una concentración sustancial de masa subterránea.