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please box your answer and write clearly thanks !

Course Contents » » Problem Set #01 » PO 1.02 Neptune signal travel (25.16) -Timer | Notes | S Evaluate d ,Feedback -Print Info When the Voyager I and Voyager II spacecraft were exploring the outer planets, NASA flight controllers had to plan the crafts' moves well in advance. How many seconds elapse between the time a command is sent from Earth and the time the command is received by Voyager at Neptune? Assume the distance from Earth to Neptune is 4.50E+12 m 15000s Submit Answer Submission not graded. Use more digits. Tries 0/16 Previous Tries

Explanation / Answer

Given,

d = 4.5 x 10^12 m

We know that the signals(command) travels with the speed of light, v = c = 3 x 10^8 m/s

from the defination of speed:

speed = dist/time = d/t

t = dist/speed = d/v

t = 4.5 x 10^12/(3 x 10^8) = 1.5 x 10^4 s

Hence, t = 1.5 x 10^4 s = 1500 s.

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