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MMLU-Pro / 9786 / An observer on earth finds that the lifetime of a neutron is 6.42 × 10^2 s. What…

Problem

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

question

An observer on earth finds that the lifetime of a neutron is 6.42 × 10^2 s. What will the lifetime of a neutron be as measured by an observer in a spacecraft moving past the laboratory at a speed of 2 × 10^8 m/s?

category

physics

options

  1. 8.62 × 10^2 s
  2. 2 × 10^8 s
  3. 6.42 × 10^2 s
  4. 5.67 × 10^2 s
  5. 7.84 × 10^2 s
  6. 12.84 × 10^2 s
  7. 4.81 × 10^2 s
  8. 1.34 × 6.42 × 102s
  9. 9.58 × 10^2 s
  10. 3.21 × 10^2 s

src

stemez-Physics

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Source and history

upstream_id / Original problem ID
9786
task_id
d17ec335-bdb7-5342-95fa-c6dede81f14e
task_key
default--test--9786
task_revision_id
1
config / split
default / test

Official source

initial import