A person in a moving train waves to a bystander. If the waving action last 3 seconds as measured by the bystander and 2.2 seconds as measured by the person inside the train, how fast is the train moving? Express the speed in terms of the speed of light, c.

College Physics
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ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
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Chapter28: Special Relativity
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Problem 23PE: (a) Suppose the speed of light were only 3000 m/s. A jet fighter moving toward a target on the...
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answer the ff with complete solution num 2

1. Suppose a traveler travelled the space at 95% the speed of light. How much
time did his twin observed on Earth if upon returning, the traveler measured the
journey time to be 10 years based on his clock?
2. A person in a moving train waves to a bystander. If the waving action last 3
seconds as measured by the bystander and 2.2 seconds as measured by the
person inside the train, how fast is the train moving? Express the speed in terms
of the speed of light, c.
Transcribed Image Text:1. Suppose a traveler travelled the space at 95% the speed of light. How much time did his twin observed on Earth if upon returning, the traveler measured the journey time to be 10 years based on his clock? 2. A person in a moving train waves to a bystander. If the waving action last 3 seconds as measured by the bystander and 2.2 seconds as measured by the person inside the train, how fast is the train moving? Express the speed in terms of the speed of light, c.
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