1.The axis of the three-hinged arch ABC is a parabola with vertex at B. Knowing that P=109.2 kips and Q=72.8 kips, determine (a) the components of the reaction at C, (b) the components of the force exerted at B on segment AB.
2.Calculate the approximate alkalinity (in mg/L as CaCO3) of a water containing 120 mg/L of bicarbonate ion and 15 mg/L of carbonate ion.
3.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.
4.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 depth of 3.0 ft?