-llRocKKinGll- Member Profile in The AnswerBank

-llRocKKinGll-

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Joined: 15:59 Sat 19th Dec 2009

Last Activity: 16:05 Sat 19th Dec 2009

Gender: Male

Status: Active

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-llRocKKinGll-

about gravitational force

why at the centre of the earth ,earths gravitational force is zero?

Only 1 question