A 25-W compact fluorescent lightbulb (CFL) produces the light equivalent of a 100-W incandescent bulb. The population of North America is estimated to be about 305 million. Estimate the amount of coal needed to light one 100-W incandescent lightbulb for each person for one year and the amount of coal that would be saved if each incandescent bulb were replaced with a CFL. Assume the coal has a NHV of 28.5 MJ/kg and the power plants are 33% efficient.

Why you think the actual volume pumped in a real clean : A cylindrical volume of soil contaminated with trichloroethylene (TCE). It is about 2.5 m deep and about 4.0 m in diameter. The porosity of the soil is approximately 0.25. |

Estimate the time between when the concentration ratios : A conservative tracer is applied to the ground surface and leached through the vadose zone by rainfall. The average volumetric water content is 0.40 over the upper 4 meters and 0.30 over the remaining 3 meters above the water table |

Compute the required weight of coarse aggregate per cubic : A concrete mix with a 3-inch slump, w/c ratio of 0.50 and a sand with a fine modulus of 2.4 contains 1700 lb/cubic yard of coarse aggregate. Compute the required weight of coarse aggregate per cubic yard. |

Determine the minimum size of the pad footing 2 meters wide : A geotechnical report has suggested an allowable bearing pressure of 200kPa. Determine the minimum size of the pad footing 2 metres wide for a steel column if a factor of safety of 2.0 is recommended |

Estimate the amount of coal needed to light one 100-w : A 25-W compact fluorescent lightbulb (CFL) produces the light equivalent of a 100-W incandescent bulb. The population of North America is estimated to be about 305 million. Estimate the amount of coal needed to light one 100-W incandescent lightbulb |

Calculate the hydraulic conductivity of silica sand : A constant-head permeability test was conducted on a sample of fine silica sand. The cross-sectional area of the sample was 60 cm2 and its length was 150 mm. |

Calculate the horizontal scale factor and effective : The foundation soil for an earth dam has a horizontal hydraulic conductivity of 1.5 x 10-9 m/s and a vertical hydraulic conductivity of 1 x 10-10 m/s. It is proposed to estimate the seepage flow rate through the foundation soil using the flow net ske.. |

Determine the maximum tensile and compression stresses in : A 6ft wide, 10ft high vertical rectangular gate has its top edge 6ft below the water level. it is hinged along its lower edge. what force, acting on the top edge, is necessary to hold the gate shut? |

When the local mean time at los angeles : The longitude of Albany, New York, is +73 degrees 44' 49" and the longitude of Los Angeles, California, is +118 degrees 10' 44". When the local mean time at Los Angeles is 10h 41m 00s a.m., the local mean time at Albany is |

## How many days per year does the equipment need to be usedIf a new piece of equipment costs $40,000.00 to purchase and it has a benfit of $500 per day. How many days per year does the equipment need to be used in order to be worth purchasing (breaking even) |

## Estimate number of raccoons that attempted to cross highwaynighttime traffic on a single lane of rural highway is light, with a flow of 40 vehicles/hour , and is well described by a Poisson arrival process. A racoon dashes across the road, without looking at a speed of 12 mph. |

## F-m ration for conventional activated sludge plantA 4000-m 3 /day conventional activated sludge plant has an influent with a BOD5 of 190 mg/L and SS of 225 mg/L. What population would this plant serve? |

## What will be the surface tension effects for the tubeA water column in a glass tube is used to measure the pressure in a glass pipe. The tube is 1/4 in. in diameter how much of the water column is due to the surface tention effects |

## Find specific volume of the tank at 70degf and 200 psiA cylindrical pressure tank has internal dimensions of 14.0 inches diameter, and 36 inches length from end to end. Max. recommended pressure at 70degF is 200 PSI. The cylinder has a safety relief valve which is set at 250 PSI. |

## What will the concentration of megachlor be in four yearsMagachlor is present in a lake having a volume of 20,000,000m3 that is used for drinking water. This waterbody can be considered well mixed. Megachlor can beconsidered a conservitive pollutant. |

## What is the new water contentA soil sample with a water content of 14.5% and unit weight of 128.2 lb/cu. ft. was dried to a unit weight of 118.8 lb/cu. ft. without changing its void ratio. What is its new water content (in %)? |

## Determine the size of the beam with the least cross-sectionA simple beam of Douglas-Fir Larch, select grade, has a span of 18 ft with two concentrated loads of 3 kips each placed at the third points of the span. Neglecting its own weight, determine the size of the beam with the least cross-section |

## What is the maximum distance away for the navigation lightsAn offshore drilling rig is being towed out to sea. What is the maximum distance away that the navigation lights can still be seen by an observer standing at the shoreline |

## What should the removal efficiency of a process designedWastewater flow of 2000 m3/day containing 120g/L of salt. Discharge into a river with a flow of 34,000 m3/day and a salt concentration of 50 mg/l. The agency wants to maintain the salt level to no greater than 250 mg/L downstream of the discharge. |

## Determine annual volume of lanfill comsumed in meterA MSW landfill is being designed to handle solid waste generated by Binford at a rate of 50 Mg/d. It is expected that the waste will be delivered by compactor truck on a 5d/week basis. |

## How much was invested in each accountSuppose a person invests a total of $10,000 in two accounts. One account earns 8% annually, and the other earns 9% annually. If the total interests earned from both accounts in a year is $860, how much was invested in each account? |

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd