A sump pump (used to drain water from the basement of houses built below the water table) is draining a flooded basement at the rate of 0.75 L/s, with an output pressure of 2.9 × 105 Pa. a) The water enters a hose with a 3.4 cm inside diameter and rises 2.5 m above the pump. What is its pressure at this point, in pascals? You may neglect frictional losses.  b)The hose then goes over the foundation wall, losing 0.55 m in height, and widens to 4.1 cm in diameter. What is the pressure now, in pascals? You may neglect frictional losses.

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A: The rate of drain of water by the pump is Q=0.55 L/s=0.55 L/s×1 m31000 L=0.55×10-3 m3/s. The output…

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Variation of pressure

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