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A vertical water jet flows out of a roun...

A vertical water jet flows out of a round hole. One of the horizontal sections of the jet has a diameter d = 20mm while the other section located 1 = 20cm lower has the diameter which is n = 1.5 times less. The volume of the water flowing from the hole each second is found to be `9 xx 10^(-n) cm^3`/s. What is the value of n ? (Surface tension T = 0.073 N/m, and density of water = `10^3 `kg/`m^3`).

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