Physics 1029A/B Lecture 6: PhysicsLec6

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Additional features of a fluid flowing through a constriction: pressure change (venturi meter) 1: work needed to change the kinetic energy of the yellow fluid element o o o o o. Ethanol (p = 0. 79 g/cm ) flows smoothly through a horizontal pipe that tapers in cross sectional area. The pressure difference p between the wide (index 1) and the narrow sections (index 2) of the pipe is 5. 0 kpa. With p2 p1 = p = 5. 0 kpa. 123 l/min of an unknown liquid flow smoothly through a horizontal pipe that tapers in cross sectional area from a1 = 10 cm to a2 = a1/2. The pressure difference p between the wide and the narrow sections of the pipe is 5. 0 kpa. Solution: we start with bernoulli"s equation and the equation of continuity. Note that p > 0 in this form.

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