In the process of planetary formation, when would the inward migration of Jupiters have been most likely?
A) Shortly after all of the planets had finished forming
B) Just after the system was cleared of the remaining gas
C) Before these planets had grown to full size
D) After these planets had reached full size, but before terrestrial planets had finished forming
E) At least hundreds of millions of years after planetary formation ended
D
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Why is there a maximum vibration of the air molecules at the open end of a resonance tube?
Deep trenches in the ocean mark places where
A) one plate slides under another, returning older crust to the mantle. B) plates pull apart, leaving great rifts in the crust. C) hot mantle material rises upward and spreads sideways, pushing the plates apart. D) plates push together, creating ocean mountain chains. E) plates slip sideways relative to one another.
Polymers have a lower surface energy than metals and ceramics do, because at the polymer surface the _____________ bonds between LCMs are broken.
Fill in the blank(s) with the appropriate word(s).
Suppose a 5.0-meter diameter telescope were constructed on the dark side of the moon. The viewing there (except for brief periods of sunlight) would be excellent. As an example, what would be the separation between two objects that could just be resolved on the planet Mars in 500 nm light? [The distance to Mars at closest approach is 50 million miles.]