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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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drelog drelog
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8 years ago
To determine whether a celestial body is approaching or receding from Earth, astronomers employ ________.
A) Einstein's equation
B) high speed radar
C) the Stefan-Boltzmann law
D) the Doppler principle
E) telescopic imaging
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Earth Science

Earth Science


Edition: 14th
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PulsaPulsa
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drelog Author
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#2
8 years ago
This works! Smiling Face with Open Mouth
ןnɟʎoɾ sʎɐʍן∀ Slight Smile
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