A typical galaxy like our Milky Way galaxy contains
a. primarily planets.
b. gas only
c. stars (some with planets), gas and dust
d. a single star and planets.
e. thousands of superclusters.
C
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Mercury's average density is about 50% greater than the Moon's, even though the two bodies have similar radii. This suggests that Mercury('s)
A. interior is much richer in iron than the Moon's. B. must have a liquid water core. C. greater mass has prevented its gravitational attraction from compressing it as much as the Moon's is. D. contains proportionately far more rock than the Moon.
If Q = 25 ?C, q = 10 ?C, and L = 40 cm in the figure, what is the magnitude of the electrostatic force on q?
A. 28 N B. 22 N C. 20 N D. 14 N E. 10 N
An atom has completely filled inner shells and a single valence electron in an excited p state. The filled inner shells have an orbital momentum equal to zero
What is the magnitude of the orbital angular momentum L of the atom? A) 1.4? B) 2.0? C) 1.7? D) 1.0? E) 1.2?
_________is the minimum distance between two points that can be observed.
Fill in the blank(s) with the appropriate word(s).