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3. A Vulcan spacecraft has a speed of 0.600c with respect to Earth. The Vulcans determine...

3. A Vulcan spacecraft has a speed of 0.600c with respect to Earth. The Vulcans determine 32.0h to be the time interval between two events on Earth. What value would they determine for this time interval if their ship had a speed of 0.940c with respect to Earth? Give your answer in hours.

4. The Vulcan's spacecraft is now traveling passed Earth with a speed of 0.87c, relative to Earth. It is measured to be 48.0m long by observers on Earth. What is the proper length of the spacecraft?

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