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A log that is 2 ft in diameter is to be cut into a rectangular section for use as a simply supported beam. The material is wood select structural grade (Douglas Fir) with a specific gravity of 0.017 lb/in3. If the allowable bending stress for the wood is all = 8 ksi, determine the largest load P that can be supported if the width of the beam is b = 8 in and the height h = 16 in. Draw the shear, moment diagrams and sketch the stress distribution acting over the cross section.
A gas stream contains 18.0 mole% hexane and the remainder nitrogen. The stream flows to a condenser, where its temperature is reduced and some of the hexane is liquefied. The hexane mole fraction in the gas stream leaving the condenser is 0.0500.
The block is released from rest when the spring is unstretched (at x=0). We wish to show that the ensuing motion of the block is simple harmonic. Call the initial configuration of the system that existing just as the block is released from rest.
Suppose the average concentration of SO2 (SOsub2) is measured to be 400microgram/cu.m at 25degree celcius and 1 atm. Does this exceed the (24-hr) air quality standard of 0.14 ppm
A ball is thrown vertically upward with a speed of 15m/s. Determine the time of flight when it returns to its original position.
The oven exhaust gases are available at 250 F. Assume that the design temperature and residence time have been established as 1300 F and 0.6 sec, respectively. The type of burner used in the process requires outside air at a moass ratio of 12:1
The pavement is on a base which has a modulus of subgrade reaction of 250 pci. A 17,000 lb corner load is applied (al is 7 inches). Using the revised Westergaard equations, find the modulus of elasticity of the pavement if a corner deflection of 0..
The velocity of a particle traveling along a straight line is v=(3t^2-6t) ft/s , where t is in seconds. if s=4ft when t=0 determine the position of the particle when t=4s what is the total distance during the time interval t=0 to t=4s
Air can be assumed as a di-atomic ideal gas. Find the final temperature and the amount of work ( in kW) required for air compression at a rate of 100 mol/s , from an initial condition of 1 bar an 25 C to 10 bar; for the following ways.
Determine the estimated width of flexural cracks that will occur in the 8" (total depth) one-way slab shown in the figure below. Assume bottom clear cover is3/4". is the crack width permissible assuming the exposure is dry air
What are 3 of the equivalent fixed-point problems for f(x) = x2 - x -2=0?
for a laminar flow of a newtonian fluid in a tube of a circular cross section, show that the ratio of mean shear to the wall shear rate is 2/3
An 80-mil (2 mm) HDPE geomembrane with an allowable stress of 1,300 lb/in2 rests on a 3(H):1(V) side slope. A 18-inch thick cover soil with a unit weight of 110 lb/in3 (also unit weight of the back fill soil in the anchor trench) is placed of the ..
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