Neil A. Armstrong was the first person to walk on the moon. The distance between

Question

Neil A. Armstrong was the first person to walk on the moon. The distance between the earth and the moon is 3.85 times 10^8 m. Find the time it took for his voice to reach the earth via radio waves. s (b) Someday a person will walk on Mars, which is 5.6 times 10^-10 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. s A truck driver is broadcasting at a frequency of 27.185 MHz with a CB (citizen's band) radio. Determine the wavelength of the electromagnetic wave being used. The speed of light is c = 2.9979 times 10^8 m/s. m

Explanation / Answer

part a)

time taken = distance/time taken

time taken = 3.85 *10^8/(3 *10^8)

time taken = 1.283 s

paart b)

time taken for waves to reach = distance/speed

time taken for waves to reach = 5.6 *10^10/(3 *10^8)

time taken for waves to reach = 186.7 s

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.