p. 47
A satellite orbits around the Earth at a distance of 80 km from the Earth' s surface. If the Earth' s radius is 6400 km, how long does the satellite travel if it orbits around the Earth for 15 revolutions? [ correct your answer to 3 significant figures. ]
maths! maths! maths!
2009-08-03 5:47 am
回答 (1)
2009-08-03 6:11 am
✔ 最佳答案
Earth's radius = 6400kmRadius including the distance above the Earth = 6400km + 80 km = 6480km
Length of a complete orbit = 2(pi)r
Length of 15 complete orbit = 30(pi)r = 30 * pi * 6480km
= 611,000 km
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https://hk.answers.yahoo.com/question/index?qid=20090802000051KK01890