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Design the formwork for a 12-ft-high reinforced concrete wall. Concrete will be placed at a rate not to exceed 5 ft/h and will be internally vibrated. Temperature is expected to be 80°F. Use ¾-in. class I ply form for the sheathing and No. 2 grade Douglas fir-larch for the rest of the lumber. Use 2 × 4s for studs and doubled 2 × 6s for wales. Ties will have a capacity of 5000 lb (2-in.-wide wedges). For lateral bracing design, assume the wind to be 15 psf and use a guy wire (at 45° to the 10-ft height) that has a tensile capacity of 4400 lb.
A 20ft long beam has a support reaction at each end and a 12ft long uniformly distributed load of 20lb/ft starting on the left edge. The uniformly distributed load is modeled as a normal concentrated load of how many pounds?
a frictionless piston-cylinder is filled with 3 liters of water at 250 kpa. initially the temperature of the water is
Find graphically the forces f1 and f2 in the crane. The triangle is standing up with a 90 degree angle next to the wall on top, with f1 pointing towards it
water at a temperature of 75 oc has an internal energy of 1800 kjkg. what is its state? water with a specific volume of
Find the Doppler shift of light reflected directly back from a mirror that is approaching the observer with speed v, and show that it is the same as if the image were moving toward the observer at speed 2v/(1 + v2/c2).
tarzan king of the jungle mass 66.2 kg grabs a vine of length 14.6 m hanging from a tree branch. the angle of the vine
pool ball b is to be shot into the side pocket d by banking it off the cushion at c. specify the location x of the
a mass of 5kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125kpa. initially
A tightly stretched flexible uniform string has its ends fixed at the points x = 0 and x = l. The midpoint of the string is displaced a distance a, as shown in Figure 7.21. If f(x) denotes the displaced profile of the string, express f(x) as a Fou..
air at a velocity of 35. 2 ft sec and a pressure of 793. 1 mm hg flows in a long circular pipe whose inside diameter
A pump delivers 40 litres/min to a 90 mm bore/30 mm rod cylinder to lift a load of 200 kg. What is the pressure exerted on the piston? What is the speed at which the load will be lifted? How much power is required to lift the load at this speed?
a deep-water oil rig has just collapsed into the gulf of mexico. its blowout -preventer system has failed so thousands
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