Holy Cow Magnet!
... filings seem to arrange themselves in a pattern of lines that loop from one pole of the magnet to the other. That's because each tiny iron shaving was temporarily magnetized by the magnet. Iron is a material that becomes magnetized in the presence of strong magnets which is why magnets attract iron. ...
... filings seem to arrange themselves in a pattern of lines that loop from one pole of the magnet to the other. That's because each tiny iron shaving was temporarily magnetized by the magnet. Iron is a material that becomes magnetized in the presence of strong magnets which is why magnets attract iron. ...
Tracing Field Lines
... became a north pole and the other end became a south pole—causing the tiny piece of iron to align itself along the lines of magnetic force created by the magnet. You can think of iron filings as thousands of tiny compasses, each under the influence of the strength and direction of the magnetic force ...
... became a north pole and the other end became a south pole—causing the tiny piece of iron to align itself along the lines of magnetic force created by the magnet. You can think of iron filings as thousands of tiny compasses, each under the influence of the strength and direction of the magnetic force ...
The formation of stars and planets
... flux, and sources with strong mid/far-IR flux. One of the ideas is that disk can be self-shadowed to obtain weak mid/far-IR flux. ...
... flux, and sources with strong mid/far-IR flux. One of the ideas is that disk can be self-shadowed to obtain weak mid/far-IR flux. ...
chapter8-Section1
... this chapter, the fundamental ways in which electricity and magnetism interact with each other. ...
... this chapter, the fundamental ways in which electricity and magnetism interact with each other. ...
File
... Magnets attract and repel other magnets Suppose you get home from school and open the __________________to get some milk. As you ____________the door, it swings freely until it suddenly seems to ____________ by itself. There is a ________________ inside the refrigerator door that ___________________ ...
... Magnets attract and repel other magnets Suppose you get home from school and open the __________________to get some milk. As you ____________the door, it swings freely until it suddenly seems to ____________ by itself. There is a ________________ inside the refrigerator door that ___________________ ...
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.