Dayton has played an important role in the history of magnetic materials. A variety of magnet that you may be using every day was invented here: the modern rare earth permanent magnet. Dr. Sam Liu ...
The author starts from the dawn of authentic Chinese history (2637 B.C.) and ends with ... causing a wire carrying a current to rotate in a magnetic field.
As the time line at right shows, hundreds of times in our planet's history the polarity of the magnetic shield ensheathing the globe has gone from "normal," our current orientation to the north ...
The phenomenon "may be linked to the Earth's history of magnetic pole reversals, which have occurred nearly 200 times over the past 100 million years," said Earth.com. Understanding pole shifting ...
These findings suggest that even a medium-sized sunspot group triggered one of the most extreme magnetic storms in history. Hayakawa and his colleagues extended their investigations of the ...
in which the planet’s north and south magnetic poles swap places. While such an event is not expected to happen any time soon, they have occurred periodically throughout Earth’s history—the last ...