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Anonymous Anonymous
  • 22-08-2014
  • Chemistry
Answered

Which of these follows a cyclical pattern?

Asunspot maxima and minima
Bcondensation of a nebula
Cformation of a crater
Dformation of a black hole

Verified Answer :

AL2006
AL2006 AL2006
  • 22-08-2014

The number of sunspots, observed during the past 300 years or so,
has been found to vary up and down in a cycle of very very roughly 
about 11 years.

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