A magnet - Warren County Schools
... “magnetite.” It was discovered near Magnesta so called it magnetite.They discovered that the stone always pointed in the same direction. Later, stones of magnetite called “lodestones” were used in navigation. ...
... “magnetite.” It was discovered near Magnesta so called it magnetite.They discovered that the stone always pointed in the same direction. Later, stones of magnetite called “lodestones” were used in navigation. ...
Slideshow
... ► Has a north pole and a south pole ► Strength of electromagnetic affected by three factors # of loops in the coil (more loops = stronger) Amount of current (larger current = stronger) Presence of iron core (present = stronger) ...
... ► Has a north pole and a south pole ► Strength of electromagnetic affected by three factors # of loops in the coil (more loops = stronger) Amount of current (larger current = stronger) Presence of iron core (present = stronger) ...
Magnetic Reconnection
... The exterior end of the field line is frozen into the solar wind, which continues to flow rapidly tailwards, while the ionosphere end moves more slowly through the ionosphere. In order to move the ionospheric foot, momentum is transferred from the solar wind plasma to the ionospheric plasma, both to ...
... The exterior end of the field line is frozen into the solar wind, which continues to flow rapidly tailwards, while the ionosphere end moves more slowly through the ionosphere. In order to move the ionospheric foot, momentum is transferred from the solar wind plasma to the ionospheric plasma, both to ...
Surface temperatures at the nearside of the Moon as a
... 2005) suggest that TEI can change substantially and rapidly. For a first order comparison of the possible TSI effect on the daytime temperature and TEI effect on the nighttime temperature on the nearside of the Moon, a change of ±2 W/m2 is assumed for TSI and a change of ±0.002 W/ m2 for TEI. The follo ...
... 2005) suggest that TEI can change substantially and rapidly. For a first order comparison of the possible TSI effect on the daytime temperature and TEI effect on the nighttime temperature on the nearside of the Moon, a change of ±2 W/m2 is assumed for TSI and a change of ±0.002 W/ m2 for TEI. The follo ...
Electricity and Magnetism
... Ferromagnetic materials (ie iron): Spin of electrons line up in small regions called domains. Magnetic domains can align in a given direction to allow a magnet to induce magnetism. Lines of magnetic flux: the field lines of a magnet (similar to electric field lines) ...
... Ferromagnetic materials (ie iron): Spin of electrons line up in small regions called domains. Magnetic domains can align in a given direction to allow a magnet to induce magnetism. Lines of magnetic flux: the field lines of a magnet (similar to electric field lines) ...
Magnetic Field
... Magnetic field from a current in a straight wire l We want to calculate the magnetic field at point P, which we have chosen to be on the y axis, from a current I l We will apply the Biot-Savart law to a section of the wire Δx and then integrate over the entire length of the wire l Note that f ...
... Magnetic field from a current in a straight wire l We want to calculate the magnetic field at point P, which we have chosen to be on the y axis, from a current I l We will apply the Biot-Savart law to a section of the wire Δx and then integrate over the entire length of the wire l Note that f ...
Atoms, X-rays and Synchrotron Radiation
... discovered X-rays. His experiments involved the passing of electric current through gases at extremely low pressure. On November 8, 1895 he observed that certain rays were emitted during the passing of the current through discharge tube. His experiment that involved working in a totally dark room wi ...
... discovered X-rays. His experiments involved the passing of electric current through gases at extremely low pressure. On November 8, 1895 he observed that certain rays were emitted during the passing of the current through discharge tube. His experiment that involved working in a totally dark room wi ...
Possible origin of the Damocloids
... On 2010 March 10, we discovered a new asteroid moving along a very eccentric orbit, designated as 2010 EJ104. We observed this rapidly moving object using the 1.04/1.20 m Schmidt Telescope (Near Earth Object Survey Telescope) at the Xuyi station of Purple Mountain Observatory (PMO) (Zhao et al. 2008 ...
... On 2010 March 10, we discovered a new asteroid moving along a very eccentric orbit, designated as 2010 EJ104. We observed this rapidly moving object using the 1.04/1.20 m Schmidt Telescope (Near Earth Object Survey Telescope) at the Xuyi station of Purple Mountain Observatory (PMO) (Zhao et al. 2008 ...
THEORETICAL STUDY OF THE SOLAR MAGNETIC CYCLE AND
... Sunspots are the seats of large-scale strong magnetic field on the surface of the Sun. The number of sunspots on the face of the Sun is observed to vary cyclically with an average period of about 11 years. However the solar cycle is not regular. The strength of the sunspot cycle as well as its perio ...
... Sunspots are the seats of large-scale strong magnetic field on the surface of the Sun. The number of sunspots on the face of the Sun is observed to vary cyclically with an average period of about 11 years. However the solar cycle is not regular. The strength of the sunspot cycle as well as its perio ...
Van Allen radiation belt
A radiation belt is a layer of energetic charged particles that is held in place around a magnetized planet, such as the Earth, by the planet's magnetic field. The Earth has two such belts and sometimes others may be temporarily created. The discovery of the belts is credited to James Van Allen and as a result the Earth's belts bear his name. The main belts extend from an altitude of about 1,000 to 60,000 kilometers above the surface in which region radiation levels vary. Most of the particles that form the belts are thought to come from solar wind and other particles by cosmic rays. The belts are located in the inner region of the Earth's magnetosphere. The belts contain energetic electrons that form the outer belt and a combination of protons and electrons that form the inner belt. The radiation belts additionally contain less amounts of other nuclei, such as alpha particles. The belts endanger satellites, which must protect their sensitive components with adequate shielding if their orbit spends significant time in the radiation belts. In 2013, NASA reported that the Van Allen Probes had discovered a transient, third radiation belt, which was observed for four weeks until destroyed by a powerful, interplanetary shock wave from the Sun.