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We are digging a hole to build a building. Calculate the energy needed to bring the soil to surface level. Remember the sides of the excavation lie at 45 degrees. Else, the whole would be constantly refilling itself.Given,density of soil= 140 lb/ft^3The foundation is rectangular,Breadth= 300'width=30'Depth=18'Excavation includes 45 degree slopeCAT 329 ExcavatorBucket curling force(Fb)=45 Kipstick crowd force(Fs)=30 kipBucket tip radius T=4'11''Stick length(s)=6'
A rigid 1ft^3 vessel contains R-134a originally at -20F and 27.7% quality. The refrigerant is then heated until its temperature is 100F. Calculate the heat transfer required to do this, in Btu.
North City must choose between two new snow-removal machines. The SuperBlower has a $70,000 first cost, a 20 year life, and an $8000 salvage value. At the end of 9 years , it will need a major overhaul costing $19,000.
Determine the water level rise in an unconfined aquifer produced by a seasonal precipitation of four inches. The aquifers porosity is 20 percent and its specific retention is 9 percent.
An intersection approach volume is 1,500 veh/h and includes 12% left turns with a through-vehicle equivalent of 2.3 tvu's/left turn. What is the total equivalent through volume on the approach
A fireman reduces the exit area on a nozzle so that the velocity inside the hose is quite small relative to the exiting velocity. What is the maximum exiting velocity and what is the maximum height
a component in a packaging machine is subjected to a tensile load of 36.6 KN which will be repeated several times over the life of the machine. The cross-section of the component is 12 mm thick and 20 mm wide.
You arrive at your bus stop at some random point in the cycle, what is your expected wait time, w(t), to board a bus. Be sure to show your work or you will lose points. What is the standard deviation in w(t) given the fact that there is no bus wait..
A pair of dice is tossed repeatedly. Find the probability that an 11 occurs for the first time on the 6th toss.
The mass of the compacted soil specimen is 1.91 kg and its water content is 14.5%. Using a specific gravity of solids of 2.66, compute the degree of saturation, density and unit weight of the compacted soil
Determine the length of roadway that is in full superelevation for a four-lane expressway with a 60 mph design speed. The BC of the curve is at station 15+00 and has a minimum allowable radius. The curve delta is 25 degrees and 30'.
using the stress transformation quations only,given a stress state where sigma x=6500 psi,sigma y= 17,300 psi and tau xy=2900 psi, determine the principal stresses,the principal angle and the maximum shear stress.
An empty air tank has a volume of 0.024 m3. The compressor on the tank is run until the pressure gauge reads about 65 psi (or 22,500 Pa). Assuming the temperature of the tank is 25 C, find the density of the air and the weight of the air in the ta..
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