Questions and answers to some frequently asked questions concerning Earth's magnetic field with images and useful references

According to Wikipedia:
The Earth is not spherically symmetric, but is slightly flatter at the poles while bulging at the Equator: an oblate spheroid. There are consequently slight deviations in...

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Models with mobile-lid resurfacing have high core-mantle boundary heat flow, for 1 Gyr after the event, predicting a current magnetic field
Models with mobile-lid resurfacing have large center of m...

Methods for solving problems in orbital mechanics using conservation of energy and momentum are discussed.

National Ocean Service's Education Online tutorial on Corals?

1. TRANSFORMER comprising:
a. Thick Coil of short length and few turns, which acts as the primary in the transmitter and as the secondary in the receiver.
b. Thin Coil of longer length and many turns, which acts as the secondary in the transmitter and as…