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The loaded trailer has a mass of 900 kg with center of mass at G and is attached at A to a rear-bumper hitch. If the car and trailer reach a velocity of 60km/h on a level road in a distance of from rest with constant acceleration, compute the vertical component of the force supported by the hitch at A. Neglect the small friction force exerted on the relatively light wheels.
Two remediation options are being considered for a contaminated land area formerly used for industrial operations. Option 1 involves removing all of the contaminated soil over a two-year period at a cost of 2.2$ million per year.
Imagine you have been given a contract by the university to construct a real-size building. The university has requested you conduct a life-cycle assessment of the building to ensure sustainable and economically efficient use of materials.
A power plant situated 20 km directly upwind from a protected old-growth forest emits SO2 at a rate of 120 g s-1with an effective stack height of 100 m (uH= 2 m s-1).
A hemispherical bowl of radius r connected to a U-tube of constant radius r. Initially the the bowl is empty and the air/manometer liquid interface in both legs is at the level of the bottom of the bowl
A drinking water treatment plant will be designed to process a flow of 15,000 m3/d. The sedimentation tank will have a residence (detention) time of 4 hours and the overflow rate (Q/A) of 16 m 3 /m 2 -day. Estimate the required surface area (A), an..
What determines the level of solar UV-B radiation at a specific place
A bowling ball is cast on the "alley" with a backspin of = 12 while its center has a forward velocity of = 7 Radius= 120 mm Determine the velocity of the contact point in contact with the alley.
Determine the final phase of the water in the tank. Calculate the final temperature (oF) of the water in the tank.
When fluid of specific weight 8.2 KN/m^3 flows in a 150-mm-diameter pipe, the frictional stress between the fluid and the pipe wall is 25 N/m^2. Calculate the friction head loss per meter of pipe. If the flow rate is 42 L/s, how much power is lose pe..
A 3m deep layer of clay is underlain by impervious rock. An extensive area of fill is to be placed over the site.
Earth whose in situ weight is 110 lb per cf and compacted weight is 124 lb per cf is placed ina a fill at rate of 280 cy per hr, measured as compacted earth. The thickness of the compacted layers is 8 in.
A soil borrow material in its natural state in the ground has a unit weight of 118pcf. Its natural water content is 7%. What is the dry unit weight of this material?
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