文学城论坛
+A-

r/2(R+r)=about 4%o.Please note the tangent line.

jinjing 2011-08-13 14:27:31 ( reads)

跟帖(3)

贫论员

2011-08-15 12:07:10

0.4%?

jinjing

2011-08-15 16:33:51

Yes.Only estimat,we don't know the time,it has relation with the

jinjing

2011-08-15 16:50:46

It has relation with the rotation of the Earth.