An astronaut on a spaceship moving at 0.927c says that the trip ...

[asd123]

An astronaut on a spaceship moving at 0.927c says that the trip between two stationary stars took 7.49 y. How long does this journey take as measured by someone at rest relative to the two stars?
 
  A) 20.0 y
  B) 2.81 y
  C) 4.05 y
  D) 22.1 y

Question 2

As a particle's uncertainty in position gets smaller, its uncertainty in velocity
 
  A) must remain unchanged.
  B) must decrease enough to satisfy the uncertainty principle.
  C) must increase enough to satisfy the uncertainty principle.

[joechoochoy]

Answer to Question 1

A

Answer to Question 2

C

[asd123]

Excellent

[diana chang]

Thanks for the timely response, appreciate it