A spaceship from another galaxy passes over the solar system directly above a radial line from the sun to the Earth. (We measure that distance to be 1.5 × 10^11 m.) On Earth, the spaceship is observed to be traveling at a speed of 0.80 c, for which g = 5/3 . As measured on Earth it takes the spaceship 625 seconds to travel from the sun to Earth. When a scientist in the spaceship measures the
Earth-sun distance and the time it takes her to travel that distance, she finds the results are respectively
a. 9.0 × 10^10 m; 375 s.
b. 9.0 × 10^10 m; 625 s.
c. 1.5 × 10^11 m; 625 s.
d. 2.5 × 10^11 m; 625 s.
e. 2.5 × 10^11 m; 1042 s.
A
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