In the above H-R diagram, which main sequence star is bluish in color?

A. A
B. B
C. C
D. D
E. E


Answer: A

Physics & Space Science

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Indicate whether the statement is true or false

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Oxygen molecules are 16 times more massive than hydrogen molecules. At a given temperature, the average molecular kinetic energy of oxygen, compared to hydrogen,

A) is greater. B) is less. C) is the same. D) cannot be determined since pressure and volume are not given.

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A. an electron. B. a helium nucleus. C. two electrons bound to two neutrons. D. electromagnetic radiation.

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a. True b. False Indicate whether the statement is true or false

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