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By appealing to a generalization of the Stokes–Einstein formula, we predict that the ratio ζ/η between the bulk and shear viscosities is the same for all alkali liquid metals at the melting temperature. From experimental information we conclude that ζ/η=3.0±0.7. Next, we have explored an inequality for ζ/η derived by Buchel from a strong coupling model limit via anti-de Sitter/Conformal Field Theory...
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