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OpenStudy (mtimko):
How long (in s) does it take for a radio signal from the earth to reach an astronaut on the moon? The distance from the earth to the moon is 2.4 x 105 mi.
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OpenStudy (arindameducationusc):
t=s/c where t= time taken (we need to find) s=2.4*105 miles (convert to meters) c=speed of light(3*10^8)
OpenStudy (mtimko):
How did you know to use speed of light?
OpenStudy (arindameducationusc):
radio signals are Electromagnetic waves, Even light is Electromagnetic waves. You will get your answer.....Sure.... @mtimko
OpenStudy (arindameducationusc):
If it was useful, don't forget to medal.... and fan....
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