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MMLU-Pro / 9684 / An observer O at rest midway between two sources of light at x = 0 and x = 10 m…

Problem

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

question

An observer O at rest midway between two sources of light at x = 0 and x = 10 m observes the two sources to flash simultaneously. According to a second observer O', moving at a constant speed parallel to the x-axis, one source of light flashes 13 ns before the other. Which of the following gives the speed of O' relative to O?

category

physics

options

  1. 0.60c
  2. 0.10c
  3. 0.40c
  4. 0.45c
  5. 0.53c
  6. 0.15c
  7. 0.36c
  8. 0.13c
  9. 0.25c
  10. 0.50c

src

ori_mmlu-college_physics

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Source and history

upstream_id / Original problem ID
9684
task_id
cef98d6f-3355-5e5b-88bf-442d97a4856a
task_key
default--test--9684
task_revision_id
1
config / split
default / test

Official source

initial import