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MMLU / At the present time, the temperature of the universe (i.e., the microwave…

Problem

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question

At the present time, the temperature of the universe (i.e., the microwave radiation background) is about 3 K. When the temperature was 12 K, typical objects in the universe, such as galaxies, were

choices

  1. one-quarter as distant as they are today
  2. one-half as distant as they are today
  3. separated by about the same distances as they are today
  4. two times as distant as they are today

subject

college_physics

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Source and history

Official source

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