ImagingGeek,

I asked you to solve a simple problem, one that any high school student could solve. Yet, you claim:

"I've done this before, and once again you didn't provide enough data..."

There is enough data for you to solve the problem without making any other assumptions. Instead, you would rather make invalid assumptions to come up with an answer that you want. Go back and reread Laze's Assumptions.

Assuming a value of .5 of the mass of part of the Earth in your calculation is your biggest error. Without knowing what the effective mass of the densest part of the mantle is, relative to the upper, less dense mantle, your assumption of .5 is erroneously misleading. Even you, in an early post, suggested that the near-core mantle might be too viscous to allow core movement, yet you ignore this when estimating total mass movement.

First, solve the problem I gave. If you can't do this, you don't understand Newton's Gravity Law.

Laze