X-ray astronomy of stellar coronae (Review)
... time, in 1975 when Catura et al. (1975) reported the detection of Capella as the first stellar coronal X-ray source on the occasion of a rocket flight. They estimated the X-ray luminosity at 1031 erg s−1 – four orders of magnitude above the Sun’s – and the plasma electron temperature at about 8 × 10 ...
... time, in 1975 when Catura et al. (1975) reported the detection of Capella as the first stellar coronal X-ray source on the occasion of a rocket flight. They estimated the X-ray luminosity at 1031 erg s−1 – four orders of magnitude above the Sun’s – and the plasma electron temperature at about 8 × 10 ...
chapter 6 magnetic compass adjustment
... is of negligible cross section. Should the rod be aligned in some horizontal direction between those headings which create maximum and zero induction, it would be induced by an amount which is a function of the angle of alignment. If a similar rod is placed in a vertical position in northern latitud ...
... is of negligible cross section. Should the rod be aligned in some horizontal direction between those headings which create maximum and zero induction, it would be induced by an amount which is a function of the angle of alignment. If a similar rod is placed in a vertical position in northern latitud ...
SOHO`s Frequently Asked Questions
... Good question. Even scientists can debate the answer to this one. Two leading answers are "yellowish-white" and "green." Our eyes perceive sunlight as being yellow or white -- but DO NOT LOOK AT the Sun to confirm this! It is also correct to say it is "green," too, because the Sun's peak wavelength ...
... Good question. Even scientists can debate the answer to this one. Two leading answers are "yellowish-white" and "green." Our eyes perceive sunlight as being yellow or white -- but DO NOT LOOK AT the Sun to confirm this! It is also correct to say it is "green," too, because the Sun's peak wavelength ...
STEINERT Magnetic Drum
... drum going in the same direction, the flow is easy to handle and ferrous losses are small. Even when the material is large, small or mixed, the size of the particles usually determines the diameter of the drum. ...
... drum going in the same direction, the flow is easy to handle and ferrous losses are small. Even when the material is large, small or mixed, the size of the particles usually determines the diameter of the drum. ...
Planetary magnetic fields: Observations and models
... possibly central rocky cores (Guillot, 1999a). However, the layer thicknesses are not well-constrained for planets other than the Earth. Outer solar system satellites exhibit a wide variety of sizes, from tens of kilometers to larger than the planet Mercury, and have mean densities that are icy to r ...
... possibly central rocky cores (Guillot, 1999a). However, the layer thicknesses are not well-constrained for planets other than the Earth. Outer solar system satellites exhibit a wide variety of sizes, from tens of kilometers to larger than the planet Mercury, and have mean densities that are icy to r ...
Chapter 26 Magnetism - Farmingdale State College
... Figure 26.5 Deflecting a charged particle into a circular path. the force on a charge in a magnetic field is found by the right-hand rule. Point the fingers of your right hand in the direction of the velocity vector v with your palm facing the magnetic field vector, B. Then rotate your right hand fr ...
... Figure 26.5 Deflecting a charged particle into a circular path. the force on a charge in a magnetic field is found by the right-hand rule. Point the fingers of your right hand in the direction of the velocity vector v with your palm facing the magnetic field vector, B. Then rotate your right hand fr ...
Magnetic Mysteries
... This is a demonstration of two things: electromagnetic induction and Lenz's Law. Copper is not magnetically sensitive, but it is an excellent conductor of electricity. When either magnet falls through the copper pipe, there is a current of electricity that is induced. The neodymium magnet creates a ...
... This is a demonstration of two things: electromagnetic induction and Lenz's Law. Copper is not magnetically sensitive, but it is an excellent conductor of electricity. When either magnet falls through the copper pipe, there is a current of electricity that is induced. The neodymium magnet creates a ...
Electric and Magnetic Fields and Your Health
... transmission line generally reach up to around 5 µT (50 mG). The field may vary over the day and through the year as more or less current flows through the line. The field strength decreases quite rapidly with increasing distance from the line. Typically, within 50 to 100 metres of the line the magn ...
... transmission line generally reach up to around 5 µT (50 mG). The field may vary over the day and through the year as more or less current flows through the line. The field strength decreases quite rapidly with increasing distance from the line. Typically, within 50 to 100 metres of the line the magn ...
Solar Radiation - Energy
... The relatively thin (around 10,000 km) chromosphere and the very extensive (up to 20 solar radii) corona are visible only during a solar eclipse and represent the Sun atmosphere.7 They are nearly transparent, although the name of the chromosphere originates from its slightly reddish colour. ...
... The relatively thin (around 10,000 km) chromosphere and the very extensive (up to 20 solar radii) corona are visible only during a solar eclipse and represent the Sun atmosphere.7 They are nearly transparent, although the name of the chromosphere originates from its slightly reddish colour. ...
What are electric and magnetic fields?
... If the current through the wire is not steady, but changes in strength and direction, these changes cause changes in the strength and direction of the magnetic field. Mains electricity in New Zealand houses, and in almost all power lines, is an alternating current (AC). An alternating current does ...
... If the current through the wire is not steady, but changes in strength and direction, these changes cause changes in the strength and direction of the magnetic field. Mains electricity in New Zealand houses, and in almost all power lines, is an alternating current (AC). An alternating current does ...
Chapter 8: Magnetism - Farmingdale State College
... poles repel, while unlike magnetic poles attract. Thus, when the north pole of a compass needle points in a northerly direction on the surface of the earth, it is really being attracted toward a south pole. Hence, what is called the north magnetic pole of the earth is really a south pole. But becaus ...
... poles repel, while unlike magnetic poles attract. Thus, when the north pole of a compass needle points in a northerly direction on the surface of the earth, it is really being attracted toward a south pole. Hence, what is called the north magnetic pole of the earth is really a south pole. But becaus ...
Revision_JIM-14-256
... used in large-scale structures, MRE devices with multiple larger MRE materials are expected. This paper addresses the critical issue in designing a large scale device with multiple layers of low magnetic conductive MRE materials, i.e. magnetic circuit design. The primary target in magnetic circuit d ...
... used in large-scale structures, MRE devices with multiple larger MRE materials are expected. This paper addresses the critical issue in designing a large scale device with multiple layers of low magnetic conductive MRE materials, i.e. magnetic circuit design. The primary target in magnetic circuit d ...
Our Solar System
... could have melted it and allowed it to differentiate into a dense metallic core and a lower density crust. a. radioactive decay b. the sun c. volcanic eruptions d. tidal forces e. impacts of small meteorites The condensation sequence suggests that __________ should condense closest to the sun. a. Jo ...
... could have melted it and allowed it to differentiate into a dense metallic core and a lower density crust. a. radioactive decay b. the sun c. volcanic eruptions d. tidal forces e. impacts of small meteorites The condensation sequence suggests that __________ should condense closest to the sun. a. Jo ...
Contrast analysis between the trajectory of the planetary system and
... solar activity. The similar periodic trends of the movement of the Sun and solar activity are currently attracting considerable attention in academia (Jose, 1965; Damon et al., 1986, 1989; Tlatov, 2007). The movement of the planetary system’s barycenter and the rotation of the Sun’s barycenter about ...
... solar activity. The similar periodic trends of the movement of the Sun and solar activity are currently attracting considerable attention in academia (Jose, 1965; Damon et al., 1986, 1989; Tlatov, 2007). The movement of the planetary system’s barycenter and the rotation of the Sun’s barycenter about ...
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.