Constraining the long-term variability and average of the Earth's magnetic field strength is fundamental to understanding the characteristics and behavior of the geomagnetic field. Questions remain about the strength of the average field, and the relationship between strength and reversal frequency, due...
Google Share on Facebook geomagnetic (redirected fromEarth's magnetic field) Encyclopedia Wikipedia ge·o·mag·ne·tism (jē′ō-măg′nĭ-tĭz′əm) n. 1.The magnetism of the earth. 2.The study of the earth's magnetism.
What is the strength of the magnetic field if there is a 45º angle between it and the proton’s velocity? (b) Is the value obtained in part (a) consistent with the known strength of the Earth’s magnetic field on its surface? Discuss. 10. An electron moving at ...
“The data suggest that the ancient magnetic field strength was at least 50 percent of the present-day field, which typically measures 40 to 60 microteslas,” says Tarduno. “This means that a magnetosphere was definitely present, sheltering the Earth 3.2 billion years ago.” To further ensure...
magnetic field strength- the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow magnetic flux density,magnetic intensity,magnetic induction field intensity,field strength- the vector sum of all the forces exerted by an electrical or magnetic field (on a unit mas...
Where does the field come from? While still a bit of a mystery, scientists generally agree that the magnetic field of the Earth starts deep in the core of the planet. The outer core of the planet is made up of molten metals, primarily iron, which is a conductor. "Churning, molten meta...
C.the magnetic strength of the Earth will disappearD.the magnetic strength of the Earth will be stronger 相关知识点: 试题来源: 解析 B 第三段第四句开始:磁场的转换给人类和动物带来许多问题。宇航员和卫星会遇到很多困难,依靠磁场指示方向迁徙的鸟类、鱼类和其他动物会在迁徙中失去方向。
The collapse of the Earth’s magnetic field―which guards the planet and guides many of its creatures―appears to have started seriously about 150 years ago, the New York Times reported last week. The field’s strength has decreased by 10 or 15 per cent so far and this has increased the...
Earth's protective magnetic field is weakening in a region across the South Atlantic. What's going on, and should we be worried?
Suppose that we follow an electron as it moves in the Earth's magnetic field (Fig. 12-17). Because v will not in general be perpendicular to B, the electron begins to spiral around a field line. As it moves into the region of increased magnetic field strength near the pole, the path...