Why is the north magnetic pole moving? (No more than 8 words) 相关知识点: 试题来源: 解析 地核液态流动变化 地球的磁场主要由外地核液态铁镍合金的对流运动产生。这些液态金属的流动形态受地核内部热量交换、地球自转科里奥利力等复杂因素影响,会随时间发生不规则变化。这种流体运动的动态调整直接导致地球磁场的...
Why is the sun magnetic?doi:10.1016/S0262-4079(16)30181-6Stuart ClarkElsevier BVNew Scientist
The Earth’s core is magnetic because it has a molten outer core that is in constant motion. The motion of the molten outer core produces an electric current which then produces a magnetic field. Iron loses its magnetism when it’s heated to a few hundred degrees, yet Earth’s core – ...
A stationary electric charge is the source of an electric field while a moving electric charge results in a magnetic field. Magnetic fields may be generated by magnetic materials or electric current in a conductor. In our day to day life, we require magnetic fields in MRI scan machines, air ...
Why does a magnetic compass needle not work in submarines? How does the magnet attract something that is originally non magnetic? What causes the magnetic field of the earth? Why do the magnetic poles of cans reverse when turned upside down? Why does a piece of iron behave like a tem...
the birds engage in a process that produces something called heteroaglandular poison — i.e. poison produced as a result of consuming a certain toxin which is then re-used by the bird for its own defenses. This happens when the birds eat poisonous plants or animals, and since the birds ...
Samsung has been using MST technology to offer a mobile payment solution for a long time. MST or the Magnetic Secure Transmission is a technology, that is also found on credit and debit cards, which securely stores the data on a magnetic strip. ...
C. they could have something to refer to in the following task D. they might compare the difficulty level of the two tasks 2. How did the participants who had received magnetic pulses do in the syllable task, compared with those who hadn’t? A. They relied more upon conscious analysis....
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