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1) Name two reasons why freshly cut wood (lumber full of moisture) checks or cracks. What is an option to minimize this?
2) What are two differences between hardwood and softwood?
3) Why is it so important that your cutting tool is harder (physically) than the material you are trying to cut.
it carries a uniform service load of 2450 lb/ft in addition to its own weight. material strengths are f'c=4000psi and fy=60000psi .assume a weight od 150 pcf for reinforced concrete.
How would the algorithm be changed if you wanted to compute the gradient with respect to the inputs of the network (i.e., with respect to the elements of the input vector p)? Carefully explain all of your steps, and write out the final algorithm.
A company facing an interest rate of 8% must choose among projects offering the following four-year cash flows. If the company is employing the net present value criterion, which project should they choose
Calculate the irreversibility for the condenser in Problem 7.100 assuming an ambient temperature of 17?C.
A closed tank having a volume of 1.0 ft3 is filled with 0.15 lb of a gas. A pressure gage attached to the tank reads 12 psi when the gas temperature is 80 F. There is some question as to whether the gas in the tank is oxygen or helium.
An underground limestone mine with production of 12,000 tons/day will use trucks for the main haulage between an ore pass and a hoist skip pocket. The hauling distance is 5500 ft. The main haulage drift is horizontal and is 12.5 ft wide and 12.5 f..
A passenger car being driven on a flat and straight section of a highway at a speed of 65 mph reaches a curved section of the highway with a grade of 5% and a radius of 1,500ft.
Determine the ratio if the buckling load is to be the same for buckling in the two planes.
A footing 3m X 3m carries a pressure of 500 kN/ m2 at a depth of 1m in a sand substrate. The saturated unit weight of the sand is 20 kN/ m3 and the unit weight above the water table is 18 kN/ m3
What are the differences between plainsawn and quartersawn lumber?
Find max pressure at bottom of gate (psi) 2. Total horizontal force on gate 3. moment about the bottom of the gate
The wood specimen is to be loaded in a testing machine until it fails in tension. The ultimate normal strength of the wood is ?ult = 1800 psi and the ultimate shear strength of the wood is ult = 800 psi.
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