Many cities have water tanks raised high off the ground to produce pressure for their residence. If one such water tank had a diameter of 4.40 m and its water level being 20.7 m above the ground. What would be the pressure at ground level if the water was not being used? (static)If at ground level a faucet had an opening with a diameter of 2.00 cm, how fast would the water come out of the faucet?

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Q: barometer

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Q: P2 h P1

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Variation of pressure

From the equation of pressure, pressure is directly proportional to the applied force.