# Physics Classical Mechanics

A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 10.0 cm. The two vertical pipes are open at the top, and the difference in water level between them is 2.0 m. Find the velocity, vm (in m/s), and the volumetric flow rate, Q (in m3/s), of the water in the main.

vm=

Q=

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1. vm = 2.213594362
Q = 0.278168471

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2. Hi, Unknown. Please show formula for your answer on Venturi flow meter. I would like to compare with mine. Thanks.

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3. Helium balloons are used regularly in scientific research. A typical balloon would reach an altitude of 45.0 km with an air density of 4.3×10−3 kg/m3. At this altitude the helium in the balloon would expand to 540000.0 m3. Take g=10 m/s2. Find the buoyant force on the ballon.

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4. any one know ss01?

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5. 23220

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