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1. A large-particle composite consisting of tungsten particles within a copper matrix is to be prepared. If the volume fractions of tungsten and copper

1. A large-particle composite consisting of tungsten particles within a copper matrix is to be prepared. If the volume fractions of tungsten and copper are 0.70 and 0.30, respectively, estimate the upper limit for the specific stiffness of this composite, given the data that follow: Copper 8.9 g/cm; E=110 GPa; Tungsten 19.3 g/cm; E=407 GPa.

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