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OpenStudy (anonymous):
Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of your answer through mathematics.
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OpenStudy (schrodingers_cat):
Apply equation for time dilation \[T =\frac{ T _{o} }{ \sqrt{1 - \frac{v ^{2} }{ c^{2} }} }\]
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