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Home Q & A Board Science-Related Homework Help Physics
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Tsync Tsync
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8 years ago
The number of sunspots and their activity peak about every:
A) year.      B) 76 years.      C) six months.      D) eleven years.      E) 36 days.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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#2
8 years ago
Exactly what I needed Smiling Face with Open Mouth
Minoring in physics
wrote...
#3
8 years ago
Cool Smiling Face with Open Mouth
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