A Spaceship Is Moving Away from an Observer at Relativistic

question 18

Multiple Choice

A spaceship is moving away from an observer at relativistic speed.Its length at rest is 100 m,but the observer measures its length as 60 m.A time interval of 84 s on the spaceship would be measured by the observer to be which of the following?

• A)50.4 s
• B)30.2 s
• C)134 s
• D)140 s
• E)​84 s

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