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1.What are the principal differences between welding, brazing, and soldering? You may need to consult another reference
2.Electromagnetic radiation may be treated from the classical or the quantum mechanical perspectives. Briefly compare these two viewpoints.
3.Compare those factors that determine the characteristic colors of metals and transparent nonmetals.
4.Are the elemental semiconductors silicon and germanium transparent to visible light? Why or why not?
5.Which of the following oxide materials when added to fused silica (SiO2) will increase its index of refraction: Al2O3, TiO2, NiO, MgO? Why?
The evaporation rate from the surface of a 3650-acre lake is 100 acre-ft/day. Estimate the depth change in the lake in feet during a 1-year period if the net inflow to the lake is 25 cfs. Is the depth increasing or decreasing
The shape below has a cut along the entire length of the member thus making it an open section. The uniform thickness is 0.125in. Determine the maximum shear stress for the shape. Compare the stress for this open shape to a shape without a cut.
if the sphere falls at a speed of 150mm/s, what is the mean velocity relative to the cylinder wall of the water in the gap surrounding the midsection of the sphere
A simple beam of Douglas-Fir Larch, select grade, has a span of 18 ft with two concentrated loads of 3 kips each placed at the third points of the span. Neglecting its own weight, determine the size of the beam with the least cross-section
Assuming that the number of days until the next dry day is geometrically distributed, what is the length of consecutive wet days that has a probability of occurence of no more than 0.05
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.
The number of flaws on a sheet of aluminum manufactured by a certain process follows a Poisson distribution. In a sample of 100m2 of aluminum, 200 flaws are counted.
how do you find the force ratio equation to determine the maximum total load that can be applied to a truss?nbspgiven a
A 1600 ft long sag verical curve (equal tangent) has a pvc at station 1200+00 and elevation o 1500 ft. the initial grade is -3.5% and the final grade is 6.5%. determine the elevation and stationing of the low point, pvi and pvt.
A 4 in. in diameter shaft moves through a well-oiled sleeve that is 12 in. long. The force required to move the shaft is 25 lbf, and the shaft velocity is 5 in./s.
A 1: 1½ : 3 mix (by mass) has a water/cement ratio of 0.4 and a cement content of (400) kg/m3. The temperatures of the ingredients are as follows
A car travelling at 60 mph in a construction area skids into a stack of concrete barriers. Skid marks leading to the crash measures 150 ft .
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