*7.18 Calculate the force F required on the piston to discharge 500 m³/s of water through the syringe shown in the Fig. 7.11 below. Take in to account only the frictional loss in the syringe needle and assume fully developed laminar flow in the needle. (Take Hwater = 103 Ns/m²). %3D 0.5° 10 40 mm Fig. 7.11

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