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Physics 7 Online
OpenStudy (anonymous):

the circumference of the earth is 4.007 x 10^7 m. find the radius of the earth in km to 4 significant figures.

OpenStudy (anonymous):

use 2 pi r = c you know c and pi solve for r c/2pi=r

OpenStudy (anonymous):

thanks!

OpenStudy (anonymous):

YW :)

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