Author Question: An astronaut on a spaceship moving at 0.927c says that the trip between two stationary stars took ... (Read 155 times)

asd123 · **on:** Jul 29, 2018

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.