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An inviscid flow field has a potential function of$ = 2 x³ y? + 4 in units of m²/s and with x and yin meters. Consider the points (co=1, yo=1)

and(x1=1.2, y1=1.7), where units are in meters. Assume water(y = 9800 N/m³) and g=9.8 m/s².What is the pressure difference pi – Po in N?

Fig: 1