First, we need to convert the flow rate from $\mathrm{ft}^3/\mathrm{h}$ to $\mathrm{ft}^3/\mathrm{s}$.
$$Q = 35 \frac{\mathrm{ft}^3}{\mathrm{h}} \times \frac{1 \mathrm{h}}{3600 \mathrm{s}} = \frac{35}{3600} \frac{\mathrm{ft}^3}{\mathrm{s}}$$
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