Which of the following statements is true regarding the stars in a stellar association?
A) They orbit a common center of mass.
B) They were not formed together.
C) They are gravitationally bound to one another.
D) They drift away from each other in a few million years.
D
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Below is a radial velocity curve for a spectroscopic binary. Which of the stars is most massive? ____________________
What will be an ideal response?
James Clerk Maxwell presented the "complete" theory of electromagnetism as how many equations?
A) 2 B) 3 C) 1 D) 5 E) 4
Cosmology is the study of the structure, history, and evolution of the observable Universe
a. True b. False Indicate whether the statement is true or false
Materials generally become warmer when light is
A) absorbed by them. B) reflected by them. C) transmitted by them. D) all of the above E) none of the above