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Serway_PSE_quick_ch39

Serway_PSE_quick_ch39 - Clayton State University Department...

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Physics for Scientists and Engineers, 6e Chapter 39 - Relativity
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Which observer in the figure below sees the ball’s correct path? 1 2 3 33% 33% 33% 1 2 3 4 5 1. the observer in the truck 2. the observer on the ground 3. both observers
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While the observers’ measurements differ, both are correct.
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A baseball pitcher with a 90-mi/h fastball throws a ball while standing on a railroad flatcar moving at 110 mi/h. The ball is thrown in the same direction as that of the velocity of the train. Applying the Galilean velocity transformation equation, the speed of the ball relative to the Earth is 1 2 3 4 5 20% 20% 20% 20% 20% 1 2 3 4 5 1. 90 mi/h 2. 110 mi/h 3. 20 mi/h 4. 200 mi/h 5. impossible to determine
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The Galilean velocity transformation gives us u x = u x + v = 110 mi/h + 90 mi/h = 200 mi/h.
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Suppose the observer O ’ on the train in the figure below aims her flashlight at the far wall of the boxcar and turns it on and off, sending a pulse of light toward the far wall. Both O ’ and O measure the time interval between when the pulse leaves the flashlight and it hits the far wall. Which observer measures the proper time interval between these two events? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 1. O 2. O 3. both observers 4. neither observer
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A crew watches a movie that is two hours long in a spacecraft that is moving at high speed through space. An Earthbound
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