Class Lecture Presentation #31
... • Both magnetic and electrostatic forces decrease as r2 . • Both forces depend on the product of “charges” (electrostatic) or “pole strengths” (magnetic). • Both exhibit “field lines” that indicate magnitude and direction of forces. • However, unlike an electrostatic charge, a magnet is always at le ...
... • Both magnetic and electrostatic forces decrease as r2 . • Both forces depend on the product of “charges” (electrostatic) or “pole strengths” (magnetic). • Both exhibit “field lines” that indicate magnitude and direction of forces. • However, unlike an electrostatic charge, a magnet is always at le ...
Volume 4 (Issue 3), March 2015
... altogether, by radiation pressure). The Perseid shower of early August is consistent, and any observer who looks up into a dark, clear sky at any time during the first part of the month will be very unlucky not to see a few Perseids. The October Draconids, associated with Comet P/Giacobini–Zinner, a ...
... altogether, by radiation pressure). The Perseid shower of early August is consistent, and any observer who looks up into a dark, clear sky at any time during the first part of the month will be very unlucky not to see a few Perseids. The October Draconids, associated with Comet P/Giacobini–Zinner, a ...
The sun, yellow dwarf star at the heart of the solar system
... directions. Since the sun rotates, the magnetic field spins out into a large rotating spiral, known as the Parker spiral. Approximately every 11 years, the sun's geographic poles change their magnetic polarity. When this happens, the sun's exterior becomes violently active and sunspots and solar flare ...
... directions. Since the sun rotates, the magnetic field spins out into a large rotating spiral, known as the Parker spiral. Approximately every 11 years, the sun's geographic poles change their magnetic polarity. When this happens, the sun's exterior becomes violently active and sunspots and solar flare ...
solar-activity-ref
... intensity vary. The shortest registered single cycle lasted 7 years and the longest 17. There have been also exceptions to the cycle, as once detected by E.W. Maunder in 1893, which showed that for 70 years, between 1645 and 1715, sunspots virtually disappeared (in his honor this is called the "Maun ...
... intensity vary. The shortest registered single cycle lasted 7 years and the longest 17. There have been also exceptions to the cycle, as once detected by E.W. Maunder in 1893, which showed that for 70 years, between 1645 and 1715, sunspots virtually disappeared (in his honor this is called the "Maun ...
Magnetic coupling in the solar system
... Bernhard stressed the point that CME models are not exclusive and all probably play a part in CME onset to some degree. All invoke a flux rope and reconnection and modelling work is able to reproduce the observations well. In those that contain twisted magnetic fields, the degree of twist drives the ...
... Bernhard stressed the point that CME models are not exclusive and all probably play a part in CME onset to some degree. All invoke a flux rope and reconnection and modelling work is able to reproduce the observations well. In those that contain twisted magnetic fields, the degree of twist drives the ...
Space, time & Cosmos Lecture 4: Our Galaxy
... The Sun with some sunspots is visible. The two small spots in the middle have about the same diameter as our planet Earth. It has a surface temperature of approximately 5,500 °C giving it a white color that often, because of atmospheric scattering, appears yellow when seen from the surface of the E ...
... The Sun with some sunspots is visible. The two small spots in the middle have about the same diameter as our planet Earth. It has a surface temperature of approximately 5,500 °C giving it a white color that often, because of atmospheric scattering, appears yellow when seen from the surface of the E ...
![Electricity and Magnetism [6]](http://s1.studyres.com/store/data/008057695_1-a43e86ba83f9bcd4b28ad304ef59325e-300x300.png)
Sun`s Exterior
... Sun’s atmosphere. The layers above are hotter than the photosphere. The layer above is called the chromosphere. This is the layer that contains the bright red storms visible during a solar eclipse. The temperature in the chromosphere ...
... Sun’s atmosphere. The layers above are hotter than the photosphere. The layer above is called the chromosphere. This is the layer that contains the bright red storms visible during a solar eclipse. The temperature in the chromosphere ...
The Solar System Section 2 The Inner Planets, continued
... – Jupiter is big enough to hold 1300 Earths. – Jupiter rotates once around its axis in less than 10 hours. – Jupiter’s atmosphere has swirling clouds of hydrogen, helium, methane, and ammonia. – Jupiter has more than 60 satellites. ...
... – Jupiter is big enough to hold 1300 Earths. – Jupiter rotates once around its axis in less than 10 hours. – Jupiter’s atmosphere has swirling clouds of hydrogen, helium, methane, and ammonia. – Jupiter has more than 60 satellites. ...
causes of solar activity - The National Academies of Sciences
... forecast energetic events. 3. Solar data at a regular cadence is often critical in helping to interpret short-lived campaign observations, i.e., it is important to put high-resolution observations into context. 4. Sampling that is too isolated in time can give misleading results. An example is the o ...
... forecast energetic events. 3. Solar data at a regular cadence is often critical in helping to interpret short-lived campaign observations, i.e., it is important to put high-resolution observations into context. 4. Sampling that is too isolated in time can give misleading results. An example is the o ...
Magnetism and Electric Currents
... it produces a strong magnetic field inside of the coil • This is referred to as an electromagnet because the magnetic field only exists when current flows through the wire ...
... it produces a strong magnetic field inside of the coil • This is referred to as an electromagnet because the magnetic field only exists when current flows through the wire ...
Supplement to Activity 9: A Soda Bottle Magnetometer
... induces its own magnetic field which interacts with the Earth's field to cause fluctuations in the geomagnetic field near ground level and a net decrease in the field strength. Magnetometers then notice complex field ...
... induces its own magnetic field which interacts with the Earth's field to cause fluctuations in the geomagnetic field near ground level and a net decrease in the field strength. Magnetometers then notice complex field ...
N2-1,2,3 Study Guide
... Magnetic Force – the force of attraction or repulsion generated by moving or spinning electric charges Magnetic Field – the region around a magnet in which magnetic forces act Ferromagnet – a mixture of metals with strong magnetic properties Temporary Magnet – made of materials that are easily magne ...
... Magnetic Force – the force of attraction or repulsion generated by moving or spinning electric charges Magnetic Field – the region around a magnet in which magnetic forces act Ferromagnet – a mixture of metals with strong magnetic properties Temporary Magnet – made of materials that are easily magne ...
Geomagnetic storm
A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field that interacts with the Earth's magnetic field. The increase in the solar wind pressure initially compresses the magnetosphere. The solar wind's magnetic field interacts with the Earth’s magnetic field and transfers an increased energy into the magnetosphere. Both interactions cause an increase in plasma movement through the magnetosphere (driven by increased electric fields inside the magnetosphere) and an increase in electric current in the magnetosphere and ionosphere.During the main phase of a geomagnetic storm, electric current in the magnetosphere creates a magnetic force that pushes out the boundary between the magnetosphere and the solar wind. The disturbance in the interplanetary medium that drives the storm may be due to a solar coronal mass ejection (CME) or a high speed stream (co-rotating interaction region or CIR) of the solar wind originating from a region of weak magnetic field on the Sun’s surface. The frequency of geomagnetic storms increases and decreases with the sunspot cycle. CME driven storms are more common during the maximum of the solar cycle, while CIR driven storms are more common during the minimum of the solar cycle.Several space weather phenomena tend to be associated with or are caused by a geomagnetic storm. These include: solar energetic Particle (SEP) events, geomagnetically induced currents (GIC), ionospheric disturbances that cause radio and radar scintillation, disruption of navigation by magnetic compass and auroral displays at much lower latitudes than normal. In 1989, a geomagnetic storm energized ground induced currents that disrupted electric power distribution throughout most of the province of Quebec and caused aurorae as far south as Texas.