Panel PROBLEM 3.57 s show, a round viewing window of diameter mated in a large tank of seawater (S= 1.03).The w is 1.2 m below the water surface, and the wind t 60° with respect to the horizontal. Find the acting on the window and locate the correspondi Windo h Sea water D 60° PROBLEM 3.58

The block slides at a constant speed on a surface with friction. In each case, the water jet has velocity 50 m/s and cross-sectional area 5 cm2, and the block has velocity 25 m/s. In case (a), the jet is deflected to an angle of 60° from horizontal relative to the block, as shown. In case (b), the jet is deflected 180°. Calculate the friction force in each case. Apply both a moving Reference Frame (RF) and a fixed RF. Use the VSM. Check that both RFs give the same friction force for a given case. (We would not expect the two cases to have the same friction force!) Density of water is 1000 kg/m3. All jets are open to the atmosphere. case (a) 60° case (b)

Q4: A tank of water empties by gravity through a horizontal pipe into another tank in figure (1) .There is a sudden enlargement in the pipe as shown.At a certain time the difference in levels is 3m.Each pipe is 5m long and has a friction coefficient Cf-0.007 The inlet loss constant is K=0.5 and bore diameter in point A 20mm ,and bore diameter in point B 60mm.Calculate this point. the volume flow rate at Calculate the volume flow rate at this point. (1) 20 mm bore diameter 3 m 60 mm bore diameter (2)

A 90° elbow in a horizontal pipe is used to direct water flow upward at a rate of 47 kg/s. Another identical elbow is attached to the existing elbow such that the water flow makes a U-turn as shown in the second figure. The diameter of the entire elbow is 10 cm. The elbow discharges water into the atmosphere, and thus the pressure at the exit is the local atmospheric pressure. The elevation difference between the centers of the exit and the inlet of the elbow is 50 cm. The weight of the elbow and the water in it is considered to be negligible. Take the momentum-flux correction factor to be 1.03 at both the inlet and the outlet. Take the density of water to be 1000 kg/m³. Water m kg/s Water 2 1 FRI 50 cm FRX 50 cm If another (identical) elbow is attached to the existing elbow so that the fluid makes a U-turn, determine the magnitude of anchoring force needed to hold the elbow in place. The magnitude of anchoring force needed to hold the elbow in place is 438 * N.