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11 June, 11:50

When a spaceship is traveling at 99% of the speed of light (Lorentz factor = 7), an astronomer on board the ship will find thata. everything in the ship weighs seven times more. b. the ship has shrunk to one-seventh its original length. c. everyone on the ship talks seven times slower than normal. d. All of the above. e. None of the above. Everything seems normal to the astronaut on board.

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  1. 11 June, 14:19
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    e) True. Measure the own values, so everything seems normal

    Explanation:

    In the case of special relativity, it is explicitly stated that the speed of light is constant and equal to c for all inertial observers. For this reason the measures of time and length are no longer the same for observers moving with respect to each other.

    We call the time and the proper length the magnitude measured for an observer who does not move with respect to the measurement system.

    In this case the astronomer is on the ship, for him he does not feel the movement of it, they are at rest with respect to each other. Therefore, their measurements are the so-called ones, this means that their values do not change since the two go at the same speed.

    In examining the final statements we have

    A) False. The mass measures not

    B) False. Measure own length

    C) False

    D) false

    e) True. Measure the own values, so everything seems normal
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