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The maximum wind pressure on the traffic sign is 200 kg/m2. The maximum allowable shear stress is 350 kg/cm2. Design the traffic pole (only vertical element) against torsion knowing that angle of tw
Include a description of the types of property markers used as well as any problems a surveyor may encounter in this process in your explanation. In addition, discuss the minimum alignment required
The fluid pressure in the screen of a piezometer in a saline aquifer is 7.688 x 10^5 N/m^2. The fluid density is 1055 kg/m^3 and the temperature is 14 degrees C. The elevation of the piezometer scre
A 900-mm strip of steel is bent into a full circle by two couples applied. Determine (a) the maximum thickness t of the strip if the allowable stress of the steel is 420 MPa, (b) the corresponding m
If arm OA rotates with a constant clockwise angular velocity of theta dot(first dirivatie)=1.5 rad/s. determine the force arm OA exerts on the smooth 4-lb cylinder B when theta=45 degrees.
Find the change in depth and in absolute water level produced by a) a smooth upward step of 1 ft b) a smooth donward step of 1 ft, in the channel bed c) find the maximum allowable size of thw upstre
A rectangular landfill in the New England area is 175 m in width, and sloped at the uniform angle of 75 degrees. Its cover system includes a drainage layer constructed of clean, medium sand (Ks = 10
A Waste water has been characterized for nitrogen-containing compounds and the TN was 26 mg N/L, the TKN was 14 mg N/L and nitrate was 27.3 mg NO3-/L. What is the potential theoretical oxygen demand
7 g helium at 50 kPa and 200 K (ideal gas, M = 4, k = 5/3) are compressed polytropically in a quasistatic process with pv1.8 to 600 kPa. find the final temperature of helium. find the work and heat
A 7 lb particle at rest is subjected to the action of its weight and forces F1= (2i+6j-2tk)lb, F2=(t^2i -4tj-1k) lb, and F3 =(-2ti) lb, where t is in seconds. the particle starts at the origin (0,0,
At the minimum volume reached during shrinkage, a specimen of soil has a void ratio of 0.87. if Gs = 2.72, calculate the shrinkage limit
water from a waste water treatment plant is released into a receiving pond that has a volume of 5 ac-ft. one of the reasons for doing this is to assure that the chlorine residual is below 0.1mg/L be
A tracer dye is injected into a 55-ft thick sandy gravel confined aquifer which has a hydraulic conductivity of 1.2 x 10^-3 ft/s. The dye appears 14 days later in an observation well 75 ft away from
Colette Lake has a surface area of 103 ha and a mean depth of 8 m. The pH of the water is 7.6. The lake receives surface water from a lake upstream, rainfall, and diffuse groundwater input. Atmosphe
At the bottom, an opening allows water to drain out at a rate, in lbm/s, that is proportional to H(t), the instantaneous height of water in the barrel, in ft: rate of water leaving from bottom = 9*H
Aluminum ion (Al3+) is present in an industrial wastewater at 3 mg/L. The treatment facility wants to precipitate out the aluminum until there is only 0.2 mg/L remaining. What pH is required to ache
An exhaust system was added to provide 1 air exchange per hour (ACH) in the crawl space. The outdoor concentration of radon is 1 pCi/L. Estimate the radon concentration in the crawl spce (in pCi/L).
Suppose that 0.03% of plastic containers manufactured by a certain process have small holes that render them unfit for use. Let X represent the number of containers in a random sample on 10000 that
The number of flaws on a sheet of aluminum manufactured by a certain process follows a Poisson distribution. In a sample of 100m2 of aluminum, 200 flaws are counted.
Wheeling-Pittsburg steel is investigating whether it should replace some of its basic oxygen furnace equipment now or wait to do it later. The cost later (3 years from now) is estimated to be 1,700,
What diameter of a circular conduit flowing full would be required to carry the same quantity of flow as in a concrete trapezoidal channel of 20 ft width and 45 degrees side slopes, running at a dep
You are designing a new thermometer using Galinstan, an alloy of gallium, indium, and tin that is a liquid at normal living temperatures. The coefficcient of thermal expansion is 190*10^-6 (1/kelvin
Electrical Engineering Design Report about any topic prefer charger and inverter
A 100 lb force vector F is aligned from A to B. Point A is located at the coordinates (2, 2, 2) and point B at (4,5,6). Calculate the moment of F about the y axis.
Calculate the concentration of oxygen in the water in equilibrium (in mg/L) with the atmosphere near La Paz, Bolivia (3650 m), at 20 degrees Celcius.