The most massive region of the Milky Way Galaxy is _____
A. the galaxy's bulge
B. the dark matter halo
C. the galaxy's disk.
D. the supermassive black hole.
Ans: B. the dark matter halo
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Pluto, Eris and Ceres are all examples of
A) Kuiper belt objects B) dwarf planets C) asteroids D) planets
Four equal charges are located at the corners of a square of side d. If the magnitude of each charge is doubled, then what happens to the resultant force on each charge?
A) It is doubled. B) It is quadrupled. C) It increases by a factor of 8. D) It remains the same. E) None of the other choices is correct.
The reason the planets appear to be near the ecliptic is
a. the planets revolve around the Sun in nearly the same plane b. compared to the stars, the planets are near the Sun. c. because the Sun orbits the Earth once per year. d. the ecliptic is only 23 degrees from the celestial equator. e. the planets are much nearer to us than the Sun.
In former times, most beverage containers were refillable
What will be an ideal response?