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The Harvard radiology department supports this page that explains
how an MRI (Magnetic Resonance Imaging) works. Visit this site
and learn why it is important to put the patient in this large
to Use a Compass?
This page, designed by a Norwegian student, describes how to
use magnetic north and true north to navigate. What is magnetic
Electric Motors Work This site is devoted to explaining the inner workings of
basic technologies. Explore this web site and determine why
motors must have commutators and brushes.