The Figure Shows a Side View of a Galaxy That

question 30

Multiple Choice

The figure shows a side view of a galaxy that is 50.0 light years in diameter. This value for the diameter is its proper length. A spaceship enters the galactic plane with speed 0.995c relative to the galaxy. Assume that the galaxy can be treated as an inertial reference frame. Note: A light year is the distance that light travels through vacuum in one year; that is, 1 light year = c × (1 year) .
-How long does it take the spaceship to cross the galaxy according to an observer at rest in the galaxy?

• A)5.00 years
• B)12.5 years
• C)49.8 years
• D)50.3 years
• E)90.0 years

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