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qid 9228 · physics

Question: In 1985 the space shuttle Challenger flew a cesium clock and compared its time with a fixed clock left on Earth. The shuttle orbited at approximately 330 km above Earth with a speed of 7712 m/s. Calculate the expected time lost per second (in picoseconds) for the moving clock and compare with the measured result of $-295.02 \pm 0.29 ps/s$, which includes a predicted effect due to general Relativity of $35.0 \pm 0.06 ps/s$

  1. 275.98
  2. 160.34
  3. 220.45
  4. 330.76
  5. 450.29
  6. 400.12
  7. 295.02
  8. 200.50
  9. 365.44
  10. 310.87

Our answer: D. 330.76 Source quote machine-checked (exact quote)

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How it was answered

Multi-step solver (maze), replayed by code

card: maze · card sha256 2d9394ca100f64e9…

Current source

OpenStax, University Physics Volume 3, Section 5.3 "Time Dilation"

https://openstax.org/books/university-physics-volume-3/pages/5-3-time-dilation

“In 1971, American physicists Joseph Hafele and Richard Keating verified time dilation at low relative velocities by flying extremely accurate atomic clocks around the world on commercial aircraft. They measured elapsed time to an accuracy of a few nanoseconds and compared it with the time measured by clocks left behind.”

Source quote machine-checked (exact quote)

retrieved 2026-09-18T02:26:49.154Z

page text sha256 fa6031bb85b8578f… · content sha256 e436f276aac77139…

addendum maze_qid9228_b4_maze_input_ADDENDUM_source_rs20260918T022649Z · sha256 9d19eae1f603349b… · replaces the version below, addendum sha256 bbd4f02089f3f21e…

Earlier version (superseded)

https://openstax.org/books/university-physics-volume-3/pages/5-3-time-dilation

Source weak (http_get_200_text_and_question_terms)

retrieved 2026-09-17T23:25:02.007Z

page text sha256 7b56f44797183b00… · content sha256 —

addendum maze_qid9228_b4_maze_input_ADDENDUM_source_bf20260917T232502Z · sha256 bbd4f02089f3f21e… · replaces the version below, addendum sha256 b93c5d0a5e8d93b2…

Earlier version (superseded)

No public source has been found for this card yet (3 places checked internally).

addendum maze_qid9228_b4_maze_input_ADDENDUM_source · sha256 b93c5d0a5e8d93b2…

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