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The spectral-luminosity class of the star Arae is B2 V, and that of  Herculi is K3 II. Using ...

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The spectral-luminosity class of the star Arae is B2 V, and that of  Herculi is K3 II. Using ...

The spectral-luminosity class of the star Arae is B2 V, and that of  Herculi is K3 II. Using ONLY this information, and without referring to tables or diagrams, we can tell
A)   that  Arae is hotter but intrinsically fainter than  Herculi.
B)   only that  Arae is hotter than  Herculi.
C)   that  Arae is cooler and intrinsically fainter than  Herculi.
D)   only that  Arae is cooler than  Herculi.

Textbook

Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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Emilythorn09

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