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24-01-2018
Physics

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The moon is about 3.8 X 10^5 km from the earth. Show that its average orbital speed about earth is 1026 m/s

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25-01-2018

orbital speed = orbital path distance/time period = 2*pi*r/T
T=27.3days*24*3600=2358720s
2*pi*3.8*10^8m/2358720s = 1020m/s

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