The inability of S-waves (shear waves) to pass through a region definitively proved what about part of the core?

Answer

That the outer core is liquid.

S-waves cannot propagate through liquid material. Their absence in passing through the outer core is the conclusive evidence identifying it as being in a liquid physical state.

The inability of S-waves (shear waves) to pass through a region definitively proved what about part of the core?

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