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2) How long after the Big Bang was the Planck time, before which our current theories are completely unable to describe conditions in the universe? A) 10-10 second . B) 10-35 second . C) 10-43 second . D) 3 minutes . E) 300,000 years . Answer: C. 3) The Planck era refers to the time period . A) before the Big Bang. B) before the Planck time. ................
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