The New Encyclopędia BritannicaEncyclopędia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 27
... magnet with its two magnetic poles situated in regions near the geographical poles ( Figure 1 ) . In the sense of exact science , however , a full under- standing of the distribution of the Earth's magnetic field was not achieved until ...
... magnet with its two magnetic poles situated in regions near the geographical poles ( Figure 1 ) . In the sense of exact science , however , a full under- standing of the distribution of the Earth's magnetic field was not achieved until ...
Page 28
... MAGNETIC FIELD Elements of the geomagnetic field . The intensity , or strength , of a magnetic field at a given point is defined as the force exerted on a unit north pole positioned at that point . Fields are sometimes called field ...
... MAGNETIC FIELD Elements of the geomagnetic field . The intensity , or strength , of a magnetic field at a given point is defined as the force exerted on a unit north pole positioned at that point . Fields are sometimes called field ...
Page 29
... magnet is inclined about 11 ° of arc from the Earth's geo- graphical axis so that a pole of the magnet is directed to- ward northern Canada , then the distribution of all mag- netic elements of the magnetic field caused by the hypo ...
... magnet is inclined about 11 ° of arc from the Earth's geo- graphical axis so that a pole of the magnet is directed to- ward northern Canada , then the distribution of all mag- netic elements of the magnetic field caused by the hypo ...
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activity Africa agriculture America became become body called capital caused central centre century changes Christian Church continued core countries cultural demand direction early Earth East Eastern eclipse economic effect established Europe example feet field Figure flow force groups growth important income increase industry internal investment Italy kilometres known labour Lake land later less living magnetic major mantle material means measurements ment metres miles mountains move movement nature North observed occur ocean organization origin Orthodox patriarch percent period planning Pleistocene political population position possible present problems production region relatively remained result rise River rocks social society South species structure surface theory tion trade traditional United West Western