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There are 10 vehicles in a queue when an attendent opens a toll booth. Vehicles arrive at the booth at a rate of 4 vehicles per minute. The attendent opens the booth and improves the service rate over time following the function u(t)= 1.1 +0.3t, where u(t) is in vehicles per minute and t is in minutes. When will the queue clear, what is the total delay, and what is the maximum queue length?
A 30 feet column is braced at the mid-section to prevent premature failure. If the maximum load is 380 kips, select an appropriate W14 section, if any, to support the loading conditions.
What is the most significant difference between "free" jets and flows in confined structures (nozzles, pipes, etc.) in terms of formulation of force terms ÓF(i.e. left hand side) of the momentum equation
HZ Wireless must rebuild a cell tower recently destroyed by a tornado. A tower made of normal steel (NS) will cost $30,000 to construct and should last 15 years. Maintenance will cost $1000 per year.
What are the major nutrients required for growth of microbial population in wastewater treatment plants. List the major differences and similarities between hetrotrophic bacteria and nitrifying bacteria.
A pipe network in the form of a cube is made with twelve identical pipes. Each pipe forms an edge of the cube. If the entire inflow and outflow occurs at two adjacent corners, determine the percentage of the flow which passes through the pipe connect..
A galvanized iron pipe with a roughness height (e) of 5x10-6 m with a diameter (D) of 0.05 m and a length (L) of 100 m carries a discharge (Q) of 0.003 m3/s. Calculate the head loss (hL).
A sample of aggregates weighs 400 grams. After drying at 112oF, its weight was 398.5 grams and absorption is 10%. Determine the moisture content and the free moisture.
An insulated system contains two solid blocks in contact with each other; one hot and the other cold. After heat transfer over some time,thermal equilibrium is established in the container.
engineering ethics course where we have to select a case related to civil engineering with reference to it and discuss
Three components of an incompressible flow field are given by u=a(x^2-y^2), v unknown, and w=b, where a and b are constants. What must the form of the velocity component v be
If a certain watershed received 1,250 mm of rain during a year, stored 150 mm of water in its soil mantle, and lost 400 mm of water downstream, how much water (in mm) was lost to the atmosphere (mainly through plants)
As a consulting engineer you are hired to evaluate the operation and the unit processes within the plant and make recommendations for improvements. You are asked to consider the following units.
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