On the H-R diagram, red supergiants like Betelguese lie:

A) at the bottom left.
B) at the bottom right.
C) at the top left.
D) at the top right.
E) They can't be plotted, for they are not main sequence.


D

Physics & Space Science

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Kepler's second law, which states that as a planet moves around its orbit it sweeps out equal areas in equal times, means that

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Of all the forms of electromagnetic radiation, the one with the lowest frequency is:

A) gamma rays. B) ultraviolet rays. C) visible light. D) microwaves. E) radio waves.

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Mountains tend to form in long narrow ranges because

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