The density of blood is \( \rho = 1060 \, \text{kg/m}^3 \). The height difference \( h \) between the heart and the foot is \( 1.35 \, \text{m} \). We use the hydrostatic pressure formula:
\[ \Delta P = \rho g h \]
where \( g = 9.8 \, \text{m/s}^2 \) is the
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