21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 18, Problem 44QP

(a)

To determine

The distance of the ship reaches to the star according to the clock on the Earth.

(b)

To determine

When the person on the ship likely to return back to the Earth from the planet.

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A fictional news report stated that starship Enterprisehad just returned from a 5-year voyage while traveling at0.70c. (a) If the report meant 5.0 years of Earth time, howmuch time elapsed on the ship? (b) If the report meant5.0 years of ship time, how much time passed on Earth?
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly six months, as measured by a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have advanced exactly 76 years into the future. According to special relativity, how fast must you travel? (Give your answer with six significant digits as a multiple of c.)
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