The Solar System is about 5 billion years old and completes one orbit around the center of the Milky Way in 220 million years. Therefore, we conclude that the Solar system has completed a total of about ________ orbits around the Galactic center.
A. 5
B. 50
C. 22
D. 10
Answer: C
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Smaller worlds are more prone to atmospheric loss via impacts than large worlds because they
A) have no plate tectonics B) have weaker gravities C) are more likely to be hit D) have less internal heat
According to the special theory of relativity, physical laws are the same in frames of reference which
A. move in ellipses. B. accelerate. C. move in circles. D. move at uniform velocity.
Diffraction, optical quality, and atmospheric conditions all contribute to the limitations of what power of a telescope?
a. resolving power b. magnifying power c. diffraction power d. light gathering power e. focusing power
Translational motion is characterized by
A) motion that carries a molecule from one place to another. B) the motion used in measuring temperature. C) both of these D) neither of these