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A truck driver used sand to soak up a 1 g spill of lindane (C6H6Cl6). He placed the contaminated soil in an open drum which then filled with 150 L of water during a rainstorm. You test the water and find a concentration of 17 M/L. The partition coefficient for this chemical to the soil is 0.8 L/kg. How much sand did he place in the drum? Hint: the total mass of the lindane spill is now split between the water and the soil according to the partition coefficient.
There are 10 vehicles in a queue when an attendant opens a toll booth. Vehicles arrive at the booth at a rate of 4 per minute. The attendant opens the booth and improves the service rate over time following the function u(t) = 1.1 + .30t, where u(..
Knowing that at t= 3s slider block C has moved 57 mm to the right, Determine the velocity of slider block C at t=0, (b) the acceleration of A and C, (c) the change in position of block A after 5s.
Determine the effective size as well as the uniformity coefficient and coefficient of curvature for each soil. Determine also the percentages of gravel, sand, silt, and clay according to (a) ASTM, (b) AASHTO, (c)USCS, and (d) the British Standard.
consider the cantilever beam-mass system. formulate and solve the minimum weight design.
a ship has a cross-sectional area of 4000 ft^2 at the water line when the draft ( depth below the water line of the vessel bottom) is 10 ft. How many pounds of cargo will result in an increase of draft of 2 in ( specific weight is 64 Ib/ft^3 )
If friction between the cars and the rails is neglected, what were the magnitude and the direction of the velecity of the cars after the collision?
Calculate the (maximum) design load on a hollow AISI 1020 steel shaft with an outside diameter of 2.5 inches and an inside diameter of 2 inches. Assume a safety factor of 2.
A 30mm pipe X 460 mm rectangular duct carries air. What size square conduit is needed to transport 4m cube per sec of water at a distance of 45m and head loss of of 1.08m.
Q. What is the main objective of NASA's Mars Science Laboratory (MSL) mission? When was it launched and when and where is it scheduled to land on Mars? Explain the major differences between this mission and Mars Exploration Rovers (MER) mission?
The center to center spacing to the two tanks is 14 m. The new tank imparts 150 kPa at the ground surface. Find the increase in vertical stresses due to the weight of the two tanks mid- way between the two tanks at the center of the clay layer.
A rectangular clarifier with a length:width ratio of 3:1 receives a flow of 850m3/day. the clarifiers depth is 4.0m and the detention time of the water inthe clarifier is 2.4 hrs, what are the surface overflow rate and the horizontal flow through ..
Determine the magnitudes of the additional loads that must be applied at B and F if the resultant of all six loads is to pass through the center of the mat.
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