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The magnetic polarities of sunspots switch about every how many years?
Q1: Venus appears almost completely featureless with neither
Q5: Your roommate tells you that all engineers
Q16: Venus appears to be very bright in
Q22: Which of these objects is NOT considered
Q42: You want to study the effects of
Q44: The same physical location can be the
Q72: The degree to which a weather person's
Q88: What is the corona on the Sun?<br>A)
Q94: Jupiter's moon,Io,may have as many as 300
Q106: What is the main mechanism by which