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## Homework Statement

You fly 5000 km across the United States on an airliner at 250 m/s. You return two days later traveling at the same speed. How much less have you aged more then your friends at home.

## Homework Equations

I think the time dilation equation is used:

delta_t= delta_t'/ sqrt(1-beta^2) where beta= v/c

## The Attempt at a Solution

I have the solution from the solution manual but i'd like to know how they got to the answer, 1.39×10−8 s.

to find the delta t is the equation delta_t=delta_x/v used?

the beta is (250m/s)/(3.0*10^(8) m/s )

i keep getting 1.7 *10^-5 although the solution manual says this is incorrect.

Any advice is appreciated!