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urraberry urraberry
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2 months ago

If a spaceship of proper length 40 m is measured to have a length 30 m, how fast is it moving?



0.50 c



0.81 c



0.75 c



0.66 c



0.43 c

Textbook 
College Physics

College Physics


Edition: 5th
Author:
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moqamoqamoqamoqa
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2 months ago
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urraberry Author
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2 months ago
Brilliant
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Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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2 hours ago
Helped a lot
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