Archive: 13/01/2011

The Spin Doctor

An electron spin can be compared to the needle of a compass that points either north or south. Some electrons in a full shell point up, canceling out the electromagnetic fields of an equal number of electrons that point down.

dateJan 13, 2011 in General Physics
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Mount Etna bursts into life

( -- Europe's largest active volcano, Mount Etna on the Italian island of Sicily, erupted briefly yesterday sending flames and ash hundreds of metres into the air.

dateJan 13, 2011 in Earth Sciences
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