百度试题 题目What was the purpose when the magnetic compass was first invented? A.Divination.B.Navigation.C.Enjoyment.D.War.相关知识点: 试题来源: 解析 A 反馈 收藏
Compass A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north. Compasses Plural devices The...
Amagnetic compassis a tool that fundamentally allows for the determination of a reference point or region on Earth corresponding to magnetic north. This is slightly different from true north, but with the varying correction factors required at different points around the globe now known, a good ma...
Magnetic MomentThe magnetic moment is defined as the current multiplied by the area. In the following section, we'll show how to integrate over a rotating disc to find the magnetic moment.Answer and Explanation: To find the magnetic moment of a disc, we'll need to calculate the ...
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?()A.Quadrantal spheresB.Heeling magnetsC.Athwartships magnetsD.Fore-and-aft magnets的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.co
Did you know that magnetic compass does not always point to North? Actually, there are only a few locations on Earth where it points exactly to the True (geographic) North. The direction in which the compass needle points is known as Magnetic North, and the angle between Magnetic North and...
A magnet produces a vector field, the magnetic field, at all points in the space around it. It can be defined by measuring the force the field exerts on a moving charged particle, such as an electron. The force (F) is equal to the charge (q) times the speed of the particle times ...
to exhibit magnetism. for example, permanent magnets are used as compass needles. example of permanent magnets an everyday example of a permanent magnet is a refrigerator magnet. the image below shows the magnetic field produced by a bar magnet. the magnetic field is the sphere of influence of...
取送车作业时，调车车列的编组隔离和关门车编挂位置须按（ ）规定执行；遇线路临时限速或调车车列中挂有限速车辆，且限制速度小于线路允许速度时，国铁接轨站（所）车站值班员须向司机及有关站（场）下达车站值班员命令。由专用铁路发出时，由专用铁路安排胜任人员交与（ ）。
What is a magnetic compass and how does it work? What is its adaptive significance? How can we disrupt it? What is the purpose of the hemoglobin A1C test? Explain. What is PCR and why is it useful? What is the major outcome of a Robertsonian translocation?