Anybody know these ?
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Physics, 22.06.2019 12:50, johnthevarietyboy200
The heliocentric and the geocentric models of the solar system included these central principles
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Physics, 23.06.2019 02:30, jcastronakaya
Apropagating wave in space with electric and magnetic components. these components oscillate at right angles to each other. it may travel in a vacuum.
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