(b) A piston-cylinder arrangement is shown in the Figure below with the frictionless piston of a diameter of 0.5 m. A stirrer turning at 9000 revolutions is used against the fluid contained in the cylinder. The torque exerted by the stirrer is 1.3 Nm. The piston is held against the fluid by the atmospheric pressure of 101325 Pa. The piston moves outward by a distance of 0.7 m. What is the net work transfer to/by the system (5) Patm=101325 Pa 0.7 m stirrer

Short Answer: When you add salt to water, the boiling point is elevated. Briefly connect this to ideal solutions vs non-ideal solutions  and mention how inter-molecular forces are involved. If two components were added together and the resulting mixture approximated an ideal solution, what do you expect to be true about the molecular nature of the two components, do you expect them to be similar or dissimilar, why?

7.11. The U-bend shown in Fig. 7.23 is connected to the rest of the piping system by flexible hoses. The inside diameter of the pipe is 3 in. The fluid flowing is water, and its average velocity in the pipe is 50 ft/s. The gauge pressure at point 1 is 30 psig and at point 2 is 20 psig. What is the horizontal component of the force in the support? Flow Flexible hoses →→ Flow Support FIGURE 7.23

A submersible pump at the bottom of an underground tank lifts water to an overhead tank.The underground tank is 2 m below the surface while the overheadtank is 4 m above the surface. What is the minimum impeller size that the pump should have if all the available motors rotate at 1800 rpm?

As shown in Figure D, three water reservoirs are connected by three pipes. The diameters in each pipe is 1 ft and the Fanning friction factor in each pipe is 0.02. The effective lengths of each pipe are given in the Figure along with other relevant data. Determine the flow rate into or out of each reservoir as well as the Reynolds number in each pipe. (Hint: Start the computations by assuming that the water flows into reservoir B).

1. An incompressible fluid of kinematic viscosity v = μ/p= 10-4 m²/s flows steadily through a circular pipe of diameter d = 10 cm. The pipe flow is fully developed. Friction Factor If the average velocity V is 2 m/s, is the flow laminar or turbulent? What is the value of the friction factor, f? If the pipe is perfectly smooth on its internal surface and V is 20 m/s, the pipe flow is turbulent (double check yourself). Evaluate its friction factor using the Moody chart below. Repeat (c) by numerically solving the Colebrook formula (using, for example, Matlab). Attach the source code you used. Suppose that the pipe internal surface is rough. Also suppose that increasing V up to 200 m/s yields no change in the value of f found in (a). Determine the relative roughness, e/d, using the Colebrook formula. 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.015 0.01 Laminar Flow 64 Material Concrete, coarse Concrete, new smooth Drawn tubing Glass, Plastic Perspex Iron, cast Sewers, old Steel, mortar…

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