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A. electrical force B. gravitational force C. magnetic force D. chemical force 相关知识点: 试题来源: 解析 C。磁铁吸引铁是磁力作用,即“magnetic force”。选项 A“electrical force”是电力;选项 B“gravitational force”是重力;选项 D“chemical force”是化学力。反馈...
Magnetism is a force of nature produced by moving electric charges. Sometimes these motions are microscopic and inside of a material known as magnets. Magnets, or the magnetic fields created by moving electric charges, can attract or repel other magnets, and change the motion of other charged ...
A. iron is magnetic B. magnets are made of iron C. iron and magnets have a force between them D. magnets are very strong 相关知识点: 试题来源: 解析 C。选项 A 铁本身不是磁性的;选项 B 磁铁不是由铁制成就一定能吸引铁;选项 C 铁和磁铁之间有磁力,正确;选项 D 磁铁强不是吸引铁的本质原...
The magnetic force may even be viewed as a kind of Coriolis force (making perhaps more acceptable the apparent non-existence of magnetic monopoles). We also show that under a change of inertial frames, Faraday lines of force Lorentz contract as if 'etched' in space, while 'Coriolis' terms ...
Force is everywhere and it comes in a variety of sizes, directions, and type. We can define Force as the push or pull of an object. Learn Force definition, unit & types of Force with solved examples.
Physics - Classical PhysicsWe show that attempts to modify the force on a magnetic dipole by introducing either hidden momentum or internal forces are not correct. The standard textbook result ${\\\bf F=abla(\\\bmu\\\cdot B)}$ is correct even in the presence of time dependent electromagne...
What is a significant factor that can affect free fall? A. Magnetic force B. Electric force C. Air resistance D. Nuclear force 相关知识点: 试题来源: 解析 C。解析:文中提到“There are several factors that can affect free fall. Air resistance is a significant factor.”。 反馈 收藏 ...
THE discovery of a powerful magnetic force along the axis of a solar vortex will have suggested, no doubt, to others besides myself the possibility of a vertical magnetic force in a terrestrial cyclone. If such should exist, and the electrification of the air be positive, there would be a...