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MMLU-Pro / 9681 / A meter stick with a speed of 0.8c moves past an observer. In the observer’s…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A meter stick with a speed of 0.8c moves past an observer. In the observer’s reference frame, how long does it take the stick to pass the observer ?

category

physics

options

  1. 5.8 ns
  2. 2.2 ns
  3. 3.5 ns
  4. 4.2 ns
  5. 6.9 ns
  6. 7.1 ns
  7. 3.0 ns
  8. 2.5 ns
  9. 1.6 ns
  10. 4.6 ns

src

ori_mmlu-college_physics

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Source and history

upstream_id / Original problem ID
9681
task_id
96199825-825f-560d-b55e-dfb2bf6a4a01
task_key
default--test--9681
task_revision_id
1
config / split
default / test

Official source

initial import