Estimate the 2020 and 2025 population of the City of Fresno, Ca (any any city as a valid example) by plotting the historic data and extrapolating the trend.
In: Civil Engineering
The sentence here is long please make it short but still have the same meaning.
Please do revision! (Revision of manual
Section 4.0 Maintenance 4.1
Care And Cleaning Clean the insert frequently so that soot, ash and creosote do not accumulate. Do not attempt to clean the insert, glass or door when the unit is hot. Special care must be taken with plated surfaces in order to maintain the finish at its original brilliance. Do not use an abrasive glass cleaner which will scratch the glass or plated finish. Use only a soft clean damp cloth on the door, since some cleaners may remove the plating or paint.
4.1.1 Glass Cleaning and maintenance
Under normal operation the stove is designed to keep the glass clean. Glass cleaning may be required when burning damp wood and/or when burning slow fires. Generally if the glass is not staying clean then the unit is being under fired. Dirty glass may be self-cleaned by burning a hot fire (i.e. dry wood and opened draft controls) for a couple of hours. Good burning techniques will result in clean glass. Hand clean the glass only when the fire is out and the insert is cold. A light film can usually be cleaned with paper towel and water. If heavy cleaning is required, a ceramic glass cleaner or polish is recommended, and should be rinsed off with water for best results. To change the glass remove the 6 glass retainers and metal frame. Remove damaged glass and install the new one in place. Make sure you have a gasket around the replacement glass. Reinstall the metal frame and secure it with the glass retainers. Do not abuse the door glass by striking, slamming or similar trauma. Do not operate the stove with the glass removed, cracked or broken.
In: Civil Engineering
1. These questions will revolve around the casting process:
a. How can we produce a huge cylindrical hollow pillar using casting?
b. List process parameters that affect the fluidity of the molten metal inside the mold during casting process.
c. Why casting products have poor mechanical properties? What are common defects found in casting? List them.
In: Civil Engineering
Perform a dimensional analysis to obtain an equation for rising air bubble velocity, v. What variables would v depend on; i.e. what variables would you include in your analysis?
Assume that v is a function of d (air bubble diameter). pw (density of water), g (gravitational acceleration), and uw (viscosity of water), and perform the dimensional analysis. How many dimensionless groups do you get (and why)? Look up the defintion of Reynolds number... Is Reynolds number of the dimensionless groups resulting from your analysis?
In: Civil Engineering
Q: (TRUE) OR (FALSE):
In: Civil Engineering
What is the main limitation of a digital frame camera when compared with an analogue one?
In: Civil Engineering
In: Civil Engineering
Rudolph is a male professional ballet dancer who is looking for a new house. He wants to purchase a typical residential house which will suit his budget and his lifestyle. Being a professional dancer is a regime not just a job, and this means that Rudolph needs to train and rehearse on a daily basis. Hence, Rudolph intends to practice his dance routines in the lounge room of his new house on a frequent basis. Rudolph is your auntie’s protégé, and since you are a qualified Structural Engineer, she has asked you to assist Rudolph in finding a suitable house. You have had a meeting with Rudolph and obtained information that will assist you in analysing suitable houses and this information effectively forms your specification for this ‘project’. As a part of the decision-making process, you need to determine the following: i. The area in mm2 which Rudolph’s feet take up on the floor. ii. The pressure Rudolph will place on the floor when he is practicing his pirouettes. iii. The work that the floor has to do to stop Rudolph’s leaps. iv. The Live Load Q as per the Limit State Design Method for Rudolph’s dance routines based on the assumed velocity of his movements and leaps. v. What type of house would you recommend that Rudolph purchase? Why? vi. Rudolph has found a renovated, Victorian architecturally-styled house in a location close to his work. It is a three-bedroom, one-bathroom house constructed with floor joists at 450 mm centres and bearers at 1.6 m centres. The large 4 m x 5 m lounge room with polished timber floor boards looks particularly promising. a. What would you anticipate the Live Load capacity of the house to be based on the floor joists and bearers? b. Is this house suitable for Rudolph to practice his dance routines? Why/ why not? Provide a detailed response based on floor live loads considerations as per AS 1170.1 (discussed in the Reading Material for this module) and your calculations. c. Based solely on the dance practice criteria, do you recommend that Rudolph purchase this house? Why/ why not? Provide a detailed response with a justification for your answer. Assumptions Size of average male foot – 330 mm x 120 mm Ball of male foot – 165 mm x 120 mm Mass of average-sized male ballet dancer = 85 kg Maximum velocity Rudolph can attain is 5.88* m/s and he attains this velocity in 4.5 seconds from a stopped position; generally, he can continue at this velocity of 5.88 m/s or greater for at least 20 seconds. Consider Rudolph’s movements in this regard in terms of a vehicle. [*This velocity assumes Rudolph is capable of running 100 m in approximately 17 seconds, this is well below the Olympic records of most contemporary male athletes (Usain Bolt of Jamaica achieved a distance of 100 m in 9.68 seconds at the Olympics).] Rudolph’s leaps – 1.5 m above the ground and landing on the ball of one foot. Note: Ballet dancers tend to be smaller and lighter than the average for their sex. The information and assumptions provided in this question are simplified and would not necessarily be utilised and calculated in this manner for a real-world application. [Hint: Newton’s Laws of Motion would be useful to determine some of the required information.]
In: Civil Engineering
Please give an explanation or what the rational of the code is about, I am trying to figure it out what it means so to better understand it.
Discuss the Code Provision on Square and Rectangular HSS and Box- Shaped Members, Rounds HSS, Tees and Double Angles Loaded in the Plane of Symmetry, and Single Angles.
In: Civil Engineering
A clearing contractor purchases a dozer with a delivered price of $275,000. The company believes it can sell the used dozer after 4 yr (2,000 hr/yr) of service for $56,000. There will be no major overhauls. The company’s cost of capital is 9.2%, and its tax rate is 33%. Property taxes, insurance, and storage will run 4%. What is the time value method depreciation part of the ownership cost?
$29.94/hr |
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$36.52/hr |
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$10.44/hr |
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$39.84/hr |
In: Civil Engineering
Fire Suppression Investigation Plan
Write your plan for the investigation as described below and save it as a Word document.
In: Civil Engineering
Traffic on a section of an arterial road is flowing at a space mean speed of 40km/hr. The flow of traffic on the road section can be described using the following equation (where q represents flow in veh/hr and k represents the density in veh/km): q = 50 * (k - k^2/150) A slow moving heavy vehicle turns onto the roadway at 2pm, 2km from the beginning of the arterial road, driving at 15km/hr due to its heavy load. The vehicle impedes traffic; however, vehicles can pass the slow-moving vehicle resulting in an average space mean speed of 20km/hr upstream of the heavy vehicle. The heavy vehicles leaves the arterial road 15km after joining the traffic stream and at this point in time vehicles begin to move at the maximum flow rate. Use a space time-diagram and shock wave theory to describe this traffic event. Not all trajectories need to be presented; representative trajectories should be used to describe the flow across all the different traffic regions. Determine the speed of each shock wave, the points of intersection of each of the shockwaves and the time taken for the congestion to dissipate (maximum queue to be released).
In: Civil Engineering
What is Class B Concrete? and Before you select your concrete supplier, what is required?
In: Civil Engineering
A radioactive waste from a clinical laboratory contains 0.2 μCi (microcuries) of calcium-45 (45Ca) per litre. The reaction rate constant is 0.005/day. The radioactive calcium waste is treated in a pipe that is 200 m until it reaches below the maximum acceptable radioactivity of 0.01 μCi/L. Assume the pipe approximates a plug flow reactor
(d) Radioactive waste can be stored in a number of ways with two of the most common being deep well injection and above-ground storage (as per the example above). For deep well injection the radioactive waste is pumped hundreds or even thousands of metres below the surface of the Earth. Whereas, above-ground storage is often in buildings in isolated areas that are then guarded to prevent people from accessing the radioactive waste contained within.
What would be the advantages and disadvantages associated with each of these two methods of storing radioactive waste? Which of the two methods do you believe is superior for storing radioactive waste (explain why as part of your answer)?
In: Civil Engineering
9.20) A groundwater aquifer is contaminated with benzene. Contrast the relative effectiveness of air stripping to activated carbon adsorption by providing a preliminary design of each process.
In: Civil Engineering