Search results
Results from the WOW.Com Content Network
If the magnetic field does grow, then the system is either capable of dynamo action or is a dynamo, but if the magnetic field does not grow, then it is simply referred to as “not a dynamo”. An analogous method called the membrane paradigm is a way of looking at black holes that allows for the material near their surfaces to be expressed in ...
These magnetic fields are a hundred million times stronger than any man-made magnet, [11] and about a trillion times more powerful than the field surrounding Earth. [12] Earth has a geomagnetic field of 30–60 microteslas, and a neodymium-based, rare-earth magnet has a field of about 1.25 tesla, with a magnetic energy density of 4.0 × 10 5 J ...
For example, this temporary magnetization inside a steel plate accounts for the plate's attraction to a magnet. Whether or not that steel plate then acquires permanent magnetization depends on both the strength of the applied field and on the coercivity of that particular piece of steel (which varies with the steel's chemical composition and ...
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic).
Plate from a 16 T Bitter magnet, 40 cm diameter, made of copper. In operation it carries a current of 20 kiloamperes. Bitter magnets are constructed of circular conducting metal plates (known as Bitter plates) and insulating spacers stacked in a helical configuration, rather than coils of wire. The current flows in a helical path through the ...
In a $19.5 million NASA-funded mission, a team at George Mason University is heading a project to construct and launch a small satellite into orbit.
The magnetic field of the Sun is driving this filament eruption. NOAA image. Holly Gilbert, NASA GSFC solar scientist, explains a model of magnetic fields on the sun. A stellar magnetic field is a magnetic field generated by the motion of conductive plasma inside a star.
(Dice, for his part, once claimed that person is actually a member of a 500-year-old sect called the Order of the Rosy Cross.) Georgia officials embraced the mystery, advertising the Guidestones ...