Videos de Conceptos Relacionados
01:06Tidal Forces
The origin of Earth's ocean tides has been a subject of continuous investigation for over 2000 years. However, the work of Newton is considered to be the beginning of the proper understanding of the phenomenon. Ocean tides are the result of gravitational tidal forces. These same tidal forces are present in any astronomical body; they are responsible for the internal heat that creates the volcanic activity on Io, one of Jupiter's moons, and the breakup of stars that get too close to black holes.
01:03Modes of Standing Waves - I
A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This phenomenon...
01:04Modes of Standing Waves: II
The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end.
01:17Standing Waves
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
01:10Wave Parameters
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
01:09Torsional Pendulum
A torsional pendulum involves the oscillation of a rigid body in which the restoring force is provided by the torsion in the string from which the rigid body is suspended. Ideally, the string should be massless; practically, its mass is much smaller than the rigid body's mass and is neglected.
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played by the...
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played by the...
También podría leer
Artículos Relacionados
Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.
Ordenar por
Same author
North atlantic ocean: preliminary description of normal modes.
Science (New York, N.Y.)·1972
Video Experimental Relacionado
Updated: Jul 12, 2026
11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Las mareas oceánicas mundiales sintetizadas a partir de los modos normales.
Science (New York, N.Y.)
|May 6, 1983
Resumen
Los modos normales oceánicos sintetizan las mareas lunares, con modos energéticos que dominan la energía de las mareas M(2) y K(1). La calidad de respuesta de las mareas oceánicas (Q) se asemeja a un oscilador controlado por fricción, con M(2) global Q alrededor de 10.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- La geofísica es la geofísica.
- La dinámica de las mareas.
Sus antecedentes:
- El forzamiento de las mareas es un importante motor de los procesos oceánicos.
- Comprender la distribución de la energía dentro de los modos de marea es crucial para el modelado oceanográfico.
Objetivo del estudio:
- Para sintetizar las mareas M(2) y K(1) utilizando los modos normales oceánicos.
- Para analizar la contribución energética de diferentes modos a la síntesis de las mareas.
- Para investigar el factor de calidad (Q) de la respuesta de las mareas del océano.
Principales métodos:
- Utilizó sesenta modos normales oceánicos para la síntesis de mareas.
- Analizó la distribución de energía entre los modos más energéticos para las mareas M(2) y K(1).
Principales resultados:
- Los diez modos más energéticos representaron el 87% de la energía de las mareas M{\displaystyle M} y el 93% de la energía de las mareas K{\displaystyle K} .
- Un solo modo con un período de 29 horas contribuyó con dos tercios de la energía K.1).
- Los cálculos del modelo revelaron que la calidad de respuesta de las mareas del océano (Q) está controlada por fricción, con una Q global de aproximadamente 10 para M2).
Conclusiones:
- Los modos normales oceánicos sintetizan efectivamente los principales componentes de las mareas.
- Unos pocos modos energéticos dominan la energía de las mareas, simplificando la dinámica del sistema.
- La respuesta de las mareas del océano es similar a un oscilador amortiguado, caracterizado por un factor de calidad específico.