中国四大发明指南针的资料

Question

谁给我一个最佳答案

Answer 1

指南针的发明是我国劳动人民，在长期的实践中对物体磁性认识的结果。由于生产劳动，人们接触了磁铁矿，开始了对磁性质的了解。人们首先发现了磁石引铁的性质。后来又发现了磁石的指向性。经过多方的实验和研究，终于发明了可以实用的指南针。
希望对你有用~

Answer 2

Theearth is a big magnet. The two poles of the earth are close to the geographicalsouth pole and the geographical North pole. The magnet on the surface of theearth, when free to rotate, the nature will be due to magnet repulsion, theattraction of the north-south direction, the truth is not enough to understandthe ancients; but this kind of phenomenon, the ancients have found
Compass
The compass and compass, the main components are mounted on a shaft of the needle, the needle in the natural magnetic field can rotate freely and maintain in the direction of the magnetic meridian tangent, needle points to the geographical North pole direction can be identified by this performance. Used in navigation, geodesy, travel and military. The physical direction of the compass is composed of three parts, namely, magnetic compass and Ian, belong to China invention. According to ancient records "record" first appeared in the Warring States period magnetic mountain area.
Compass is the result of ancient Chinese working people's understanding of object magnetism in long-term practice. As one of the four great inventions of ancient China, its invention played an immeasurable role in the development of human science, technology and civilization. In ancient China, the compass was first applied to sacrifice, etiquette, military and divination and Feng Shui to determine the location.
In late eleventh Century or early twelfth Century, Chinese ships began to use compass navigation. The Northern Song Dynasty, "Ping can talk": "the boat (helm) knowledge of geography, night viewing, day view, dark view of compass." Compass used in navigation, is all-weather navigation tools, make up for astronomical navigation, the lack of navigation, to create a new era of navigation history.
By the Arabs in Europe, to create the conditions for the later European navigator sailing activities.

Answer 3

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Answer 4

指南针是用以判别方位的一种简单仪器。前身是司南。主要组成部分是一根装在轴上可以自由转动的磁针。
磁针在地磁场作用下能保持在磁子午线的切线方向上。磁针的北极指向地理的北极，利用这一性能可以辨别方向。常用于航海、大地测量、旅行及军事等方面。指南针的N指北方，E指东方，W指西方，S指南方。

Answer 5

指南针是用以判别方位的一种简单仪器。前身是司南。主要组成部分是一根装在轴上可以自由转动的磁针。
磁针在地磁场作用下能保持在磁子午线的切线方向上。磁针的北极指向地理的北极，利用这一性能可以辨别方向。常用于航海、大地测量、旅行及军事等方面。指南针的N指北方，E指东方，W指西方，S指南方。