Gas flows at a steady rate in a 120-mm-diameter pipe that enlarges to a 180-mm-diameter pipe. At a certain section of the 120-mm pipe the density of the gas is 165 kg/m^3 and the velocity is 15 m/s. At a certain section of the 180-mm pipe the velocity is 10 m/s. What must be the density of the gas at that section? If these same data were given for the case of unsteady flow at a certain instant, could the problem be solved? Discuss.

Do any of these three wells exceed the 44.3 ppm level : Nitrate concentrations exceeding 44.3 mg NO3-/L are a concern in drinking water due to the infant disease, methemoglobinemia. Nitrate concentrations are often recorded in units |

Are the elemental semiconductors silicon and germanium : Electromagnetic radiation may be treated from the classical or the quantum-mechanical perspectives. Briefly compare these two viewpoints. |

How the extent of marten site formation may be increased : Name the three factors that influence the degree to which martensite is formed throughout the cross section of a steel specimen. For each, tell how the extent of martensite formation may be increased. |

What is meant by the concept of parens patriae : What is meant by the concept of parens patriae? |

What must be the density of the gas at that section : Gas flows at a steady rate in a 120-mm-diameter pipe that enlarges to a 180-mm-diameter pipe. At a certain section of the 120-mm pipe the density of the gas is 165 kg/m^3 and the velocity is 15 m/s. |

Find the stress in the steel and the stress in the concrete : A 14-in. square concrete post is 6ft tall and reinforced by nine 3/4" diameter steel rods. Assume that the materials are high-strength concrete and ASTM-A36 structural steel. |

What is the difference in water levels between reservoirs : A wrought iron water line connecting two reservoirs at 20°C has a length of 1500 m, a diameter of 75 cm, two elbows (90º, long-radius, flanged), a fully open gate valve, and a reentrant pipe entrance. |

Find the magnitude of the velocity and acceleration for the : Sketch the flow field defined by u=3y, v=2 and derive expressions for the x and y components of acceleration. Find the magnitude of the velocity and acceleration for the point having the coordinates (3,4). Specify units in terms of L and T. |

Parallel and perpendicular lines : Write an equation in slope-intercept form of the line that passes through the given point and is perpendicular to the given line - Write an equation in slope-intercept form of the line. |

## Discharged of wastewater to aquiferWastewater is discharged into an aquifer. This wastewater contains 0.1 ppm atrazine (a common herbicide). The MCL of atrazine is 5 ppb, the density is 1.19 g/mL and the solubility is 50 ppm. 500 ft away from the plant effluent there is a permeable.. |

## Obtain the dimensionless groups that charactrize the problemThe power loss, p , in a journal bearing depends on length, L; diameter, D; clearance, c; and rotational speed, w. You also have to worry about lubricant viscosity, density, and pressure. Obtain the dimensionless groups that charactrize this probl.. |

## Determine what is the total resistance of the loadsYou have 4 resistors (loads) in parallel. What is the total resistance of those loads The loads are as follows 4ohms, 6ohms, 16ohms and 1 ohms. When calculating 1/R, round to the fourth decimal point. Percentage of error margin is 0.5 |

## Determine the pressure at all three points in the tubeAn irrigation micro-tuberises from Point A at the outlet of a supply main, up to the top of a hops trellis(Point B), before dropping down to Point C and extending on to supply an irrigation emitter. |

## Nbspan equal-tangent crest vertical curve is designed with1 an equal-tangent crest vertical curve is designed with a pvi at station 11000 and a pvc at station 10743.3. if the |

## Calculate the compression resistance of 200 uc columnCalculate the compression resistance of 200 UC 59.5 column which is 3.6 m high (between lateral supports). Both ends of the stanchion are held effectively in position but only one is also restrained in direction. Use grade 43 steel |

## Determine what is the speed of the ballast bag when it landsA hot air balloon starting on the ground ascends at a rate of 12 km/hr and is carried by the wind (horizontally) at a rate of 20 kn/h. When the balloon reaches a height of 50 m, a ballast bag is dropped. |

## Which pipe would be suggested to the axis chemical companyAxis Chemical Company needs you to design a gravity sewer to convey 1,750 GPM of toxic waste. The pipe is to be glass-lined reinforced concrete (n = 0.009). Which pipe would you suggest the Joker use |

## Calculate as many principal or maximum strainsa point within an elastic body was subjected to a system of planestress. strain gauges were used to measure that would allow for thecalculation of principal strain and stress values at that point.with the given information |

## Derive an equation for the velocity profile within the filmderive an equation for the velocity profile within the film in terms of radial distance r, measured from the cylinderaxis, the film thickness, δ, and the appropriate physicalpropertiesof the liquid. State clearly all assumptions made |

## Write brief description of 3-dimensional unsteady equationWrite a brief (No more than a few paragraphs plus the equations themselves on a) description of the three-dimensional unsteady Navier-Stokes equations as applied to water. |

## Strength of a semicrystalline polymerBriefly explain how each of the following influences the tensile or yield strength of a semicrystalline polymer and why: (a) Molecular weight (b) Degree of crystallinity (c) Deformation by drawing (d) Annealing of an undeformed material |

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