The last quasar probably died out a billion years ago, for none lie within a billion light years of us
Indicate whether the statement is true or false
TRUE
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Our solar system lies about how many light-years from the center of the nuclear bulge of the Milky Way?
a. 2400 b. 28,000 c. 110 d. 4.3
Ninety percent of all normal stars in a Hertzsprung-Russell (H-R) diagram are:
A) in the giant region. B) in the supergiant region. C) on the random sequence. D) on the main sequence.
A pattern of bright lines on a dark background is referred to as
A) an emission line spectrum B) an absorption line spectrum C) a continuous spectrum D) a bright spectrum
A swimmer swims 20 laps in a north-south facing pool in 7.00 minutes. Her first lap is toward the north. Her displacement and average velocity are
a. 0; 0. b. 0; 2.38 m/s, south. c. 0; 2.38 m/s, north. d. 1 000 m, south; 2.38 m/s, south. e. 1 000 m, north; 2.38 m/s, north.