PRINTER VERSION Chapter 24, Problem 02 (a) Neil A. Armstrong was the first perso

Question

PRINTER VERSION Chapter 24, Problem 02 (a) Neil A. Armstrong was the first person to walk on the moon (b) Someday a person will walk on Mars, which is s.60 x 1010 earth and the moon is 3.85 x 10 m. Find the time it took for his voice to reach the earth via m. Find the time it took for his voice to reach the earth via rado waves The distance between the m from the earth at the point of closest approach. Determine the minimum time that will be required for a message from Mars to reach the earth via radio waves. (a) Number Units (b) Number Units

Explanation / Answer

a) We know that the relation for speed v=distance/time then time t=distance/speed.

speed of radio waves is equal to light speed that is v=3x108 m/s

then time taken to reach the voice t=3.85x108 m/3X108 m/s=1.28 seconds.

b) similarly, on Mars, time t=5.60x1010 m/3x108 m/s=186.6 seconds=3.12 minutes

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