physiscs
posted by leena .
A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2 through a horizontal section of pipe whose crosssectional area is A2 = 0.0779 m2. The gas has a density of ρ = 1.30 kg/m3. The Venturi meter has a crosssectional area of A1 = 0.0202 m2 and has been substituted for a section of the larger pipe. The pressure difference between the two sections is P2  P1 = 128 Pa. Find (a) the speed v2 of the gas in the larger original pipe and (b) the volume flow rate Q of the gas.
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