How does the diameter of the disk of Milky Way Galaxy compare to its thickness?
A) The diameter and thickness are roughly equal.
B) The diameter is about 100 times as great as the thickness.
C) The diameter is about 10 times as great as the thickness.
D) The diameter is about 100,000 times as great as the thickness.
B
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Briefly describe how an impact could lead to a mass extinction
What will be an ideal response?
In the general theory of relativity, we assume the observer to be
A) moving at a significant fraction of lightspeed. B) moving with constant velocity. C) moving slowly compared to lightspeed. D) at rest. E) None of the above.
An alpha particle is another name for a(n) __________
Fill in the blank(s) with correct word
How far from a covnex lens of focal length 30 cm must an object be placed so the image will be virtual and 3.0 times as large as the object?
What will be an ideal response?