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Author Question: Our best measurements from Earth indicate that the star system Alpha Centauri is 4.2 light-years ... (Read 92 times)

karateprodigy

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on: Jul 28, 2018
Our best measurements from Earth indicate that the star system Alpha Centauri is 4.2 light-years away. Suppose some of our astronauts traveled there at a speed v = 0.90c. What would the astronauts measure as the distance to Alpha Centauri?
 a. 1.3 lightyears
  c. 1.8 lightyears
  b. 4.0 lightyears
  d. 2.7 lightyears

Question 2

A muon formed high in Earth's atmosphere travels at a speed 0.9900c for a distance (as we see it) of 9200 m before it decays. How far does the muon travel as measured in its frame?
 a. 2596 m
  c. 4554 m
  b. 1298 m
  d. 649 m


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steff9894

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


karateprodigy

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Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

nguyenhoanhat

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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