You should now see that the reason the mass of the star in Part A must be inferred is that the star has no known orbiting objects, which means we cannot apply Newton’s version of Kepler’s third law. Which of the following must be true if the star’s inferred mass is to be accurate?

A. We have determined that the star is a main-sequence star. B. We have measured the star’s velocity. C. The star must be located within the Milky Way Galaxy and not in another galaxy. D. We have measured the star’s spectral type.

the answer is a. at the equator

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.