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Time Variations of the Observed Magnetic Field

Introduction to Geophysics: Time Variations of the Earth's Magnetic Field

From  Wyn Williams 0 likes 117 plays 0  

The Earth's Main Magnetic field

Introduction to Geophysics: The Earth's Main Field

From  Wyn Williams 0 likes 143 plays 0  

CL - Lecture 4b - Visualising Negation

What is the difference between 'a' and 'not a'? Here we visualize them on a globe instead of a plane.

From  Haoran Peng 0 likes 463 plays 0