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80. A clock on a spaceship moving at a speed of 0.5c relative to Earth ticks every 2 seconds according to the passengers. How much time passes between ticks according to an observer on Earth? A. 1 s B. 1.73 s C. 2 s D. 3.46 s

80. A clock on a spaceship moving at a speed of 0.5c relative to Earth ticks every 2 seconds according to the passengers. How much time passes between ticks according to an observer on Earth? A. 1 s B. 1.73 s C. 2 s D. 3.46 s

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80. A clock on a spaceship moving at a speed of 0.5c relative to Earth ticks every 2 seconds according to the passengers. How much time passes between ticks according to an observer on Earth? A. 1 s B. 1.73 s C. 2 s D. 3.46 s 81. Two events occur 2 seconds apart according to an observer on Earth. What is the time difference between the events according to an observer moving at 0.9c relative to Earth? A. 1.07 s B. 2 s C. 4.36 s D. 6.72 s 82. A spaceship is traveling at a speed of 0.3c relative to an observer on Earth. The spaceship's clock ticks every 4 seconds according to the passengers. What is the time between ticks according to the observer on Earth? A. 3.2 s B. 4 s C. 4.8 s D. 5.6 s 83. If the proper length of an object is 10 meters and an observer measures its length to be 5 meters, what is the speed of the object relative to the observer? A. 0.87c B. 0.93c C. 0.97c D. 0.99c
Transcribed Image Text:80. A clock on a spaceship moving at a speed of 0.5c relative to Earth ticks every 2 seconds according to the passengers. How much time passes between ticks according to an observer on Earth? A. 1 s B. 1.73 s C. 2 s D. 3.46 s 81. Two events occur 2 seconds apart according to an observer on Earth. What is the time difference between the events according to an observer moving at 0.9c relative to Earth? A. 1.07 s B. 2 s C. 4.36 s D. 6.72 s 82. A spaceship is traveling at a speed of 0.3c relative to an observer on Earth. The spaceship's clock ticks every 4 seconds according to the passengers. What is the time between ticks according to the observer on Earth? A. 3.2 s B. 4 s C. 4.8 s D. 5.6 s 83. If the proper length of an object is 10 meters and an observer measures its length to be 5 meters, what is the speed of the object relative to the observer? A. 0.87c B. 0.93c C. 0.97c D. 0.99c
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