The distinguishing feature of a starburst galaxy is
A) the presence of an unusually large number of binary star systems containing X-ray bursters.
B) a very large luminosity compared to the total luminosity of the Milky Way.
C) strong radio emission from "lobes" of material well outside the visible boundaries of the galaxy.
D) a rate of star formation that may be 100 or more times greater than that in the Milky Way.
D
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Our local group consists of
A) 1 major galaxy. B) 2 major galaxies. C) 3 major galaxies. D) about a dozen major galaxies.
Which type of force would be the equal and opposite force to a gravitational force?
a. gravitational b. electromagnetic c. strong d. weak e. It could be any one of the above or some combination of them.
The first asteroid to be discovered was Ceres. It is the largest and most massive asteroid in our solar system’s asteroid belt, having an estimated mass of 3.0 x 1021 kg and an orbital speed of 17,900 m/s. Determine the amount of kinetic energy possessed by Ceres.
Colors seen on TV result from color
A) addition. B) subtraction. C) either of these D) none of the above