Suppose a utility generates electricity with a 36 percent efficient coal-fired power plant emitting the legal limit of 0.6 lb of SO2 per million Btus of heat into the plant. Suppose the utility encourages its customers to replace their 75-W incandescents with 18-W compact fluorescent lamps (CFL) that produce the same amount of light. Over the 10,000-hr lifetime of a single CFL, a) How many kilowatt-hours of electricity would be saved?

What would the concentration in the effluent be 7 days later : A lagoon with volume 1200 m3 has been receiving a steady flow of a conservative waste at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 10 mg/L. Assuming .. |

What is the minimum possible value for this pressure : Part of a vertical piping system consists of 8 ft of 4 in diameter, connected to 8 ft of 3 in diameter above, and connected to 8 ft of 2 in diameter above that. Water at 60 F flows up the pipe (no downward flow occurs) |

What pressure must be provided at point 1 if you neglect : A pressure gage at elevation 4.8 m on the side of a storage tank containing oil reads 34.7 kPa.Another gage at elevation 2.2 m reads 57.5 kPa. Compute the specific weight, density, and specific gravity of the oil. |

Find the steady-state concentration if the air is assumed to : Consider the air over a city to be a box 100 km on a side that reaches up to an altitude of 1.0 km. Clean air is blowing into the box along one of its sides with a speed of 4 m/s. |

Suppose the utility encourages its customers to replace : Suppose a utility generates electricity with a 36 percent efficient coal-fired power plant emitting the legal limit of 0.6 lb of SO2 per million Btus of heat into the plant. Suppose the utility encourages its customers to replace their |

What is the speed of the train relative to : The train is travelling at 0.8 m/s i relative to a man on the side of the tracks. What is the speed of the bug as seen by the man at the side of the tracks? What is the speed of the train relative to (or as seen by) the bug? |

Determine the batch weights needed for all materials for : Determine the batch weights needed for all materials for a 1yd^3 batch yielding an f'c= 2500 psi given the following information. |

What is the largest number of phases that can coexist at : Considering both temperature and pressure to be variables, what is the largest number of phases that can coexist at equilibrium in a binary alloy? |

Calculate the volume of soil that will be needed if the void : A -4% grade and a 0% grade meeting at sta. 24 + 40 and elevation 2421.54 ft are joined by an 800-ft vertical curve. The curve passes under an overpass at sta. 25+00. If the lowest elevation of the overpass is 2439.93 ft, calculate the available clear.. |

## Determine the pressure within the tank using psf as unitA water-filled U-tube manometer is used to measure the pressure inside a tank that contains air. The water level in the U-tube on the side that connects to the tank is 5 ft above the base of the tank. |

## What will be the total cost per lane-mile per inch depthIf an alternative base material is available for $5,791.50 per lane-mile per inch depth, to use it, the minimum depth for asphalt has to be increase to 6 inch with no change of base and subbasedepth. What will be the total cost per lane-mile per i.. |

## Determine the force in each of the rods in the beamDetermine the force in each of these rods. Neglect axial compression and shear in the beam. For the beam, Ib = 200(106)mm4, and for each tie rod, A = 100mm2. Take E = 200 GPa. |

## How far back from the front axle would the center of gravityhow far back from the front axle would the center of gravity have to be to ensure that the maximum tractive effort developed for front- and rear- wheel-drive options is equal (assume that all other variables are unchanged) |

## Find how much water must be added to increase water contenta moist soil has a total unit weight of 110 pcf and a water content of 6 percent. assuming that hte dry unit weight is to remain constant , determine how much water , in gallons per cubic yard, must be added to increase the water content to 12 per.. |

## Allowable shearing stressThe allowable shearing stress is 15 ksi in the steel rod AB and 8 ksi in the brass rod BC. Knowing that the torque of magnitude T=10 kip * in. is applied at A, determine the required diameter of a) rod AB, b) rod BC. |

## Calculate carbonate-noncarbonate and total hardnessCalculate carbonate, noncarbonate, and total hardness Na+ = 27.8 mg/L Cl- = 35.6 mg/L Ca+2 = 48mg/L CO3-2 = 30 mg/L Mg+2 = 12mg/L HCO3- = 61 mg/L K+ = 12 mg/L SO4-2 = 48 mg/L |

## Determine soils angle of internal friction under pressureA triaxial test was performed on a dry, cohesionless soil under confining pressure of 144 kN/m^2. If the sample failed when the deviator stress reached 395.8 kN/m^2, determine the soil's angle of internal friction. |

## What are the normal stresses in the bars afterwardThe cross sectional area of each bar is A = 400 mm2 and L = 250 mm. If the cross bar is loaded with a load P = 250 kN, what are the normal stresses in the bars afterward? |

## Calculate for the water contained in the tank the volumeWater in the amount of 1 lb is contained in a rigid closed tank. Initially the water has a quality of 0.4 at a pressure of 10 lbf/in2. Through a stirrer, work is provided to the water in the tank until the pressure quadruples. |

## What is the elevation of lower pointA pre- engineering base line was run down a very steep hill.rather than measure horizontaily down hill with steel tape: surveyor measured the vertical angle with the theodolite and slope distance with 16m steel tape. |

## Municipal utility-considering two large-scale conduitsA big municipal utility district is considering two large-scale conduits. The first includes construction of a steel pipeline at a cost of $200 million. |

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