$9\mathrm{.}16$ Two vertical parallel plates are spaced $0\mathrm{.}012$ ft apart. If the pressure decreases at a rate of $100ps\frac{f}{f}t$ in the vertical $z$ direction in the fluid between the plates, what is the maximum fluid velocity in the $z$ direction? The fluid has a viscosity of ${10}^{-3}lbf*\frac{s}{f}{t}^2$ and a specific gravity of $0\mathrm{.}8$ o $.$

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