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The walkway ABC of the footbridge is stiffened by adding the cable ADC and the short post of length L. If the tension in the cable is not to exceed 500 lb, what is the smallest value of L for which the 185-lb person can be supported at B?
Consider the air over a city to be a box 100km on a side that reaches up to an altitude of 1.0 km. The air is blowing into the box along one of its sides with a speed of 4 m/s.
given f(x) = -2x^6 - 1.5x^4 + 10x +2. use a root location technique to determine the maximum of this function. perform iterations until the approximate relative error falls below 5%.
A 3.60-g lead bullet at 28.0 degrees C is fired at a speed of 230 m/s into a large block of ice at 0 degrees C, in which it embeds itself. What quantity of ice melts?
a tension member with cross-sectional area 3 in2 resists a load of 10 kips. How do you Calculate the normal and shear stress on planes making a 0, 20, 45, and 60 angle with the transverse section.
What are the annual runoff coefficient (Runoff/Rainfall ratio) for the sub areas and for the total watershed taken as whole Sub-area Area (m2)/ Annual Precipitation (mm)/ Annual Evaporation (mm) A 10.7 1030 530 B 3.0 830 438 C 8.2 900 430 D 17...
a 1600ft long sag vertical curve(equal tangent) has a PVC at station 120+00 andelevation of 1500 ft.the initial grade is -3.5% and the final grade is +6.5%.
The rod is made of a-36 steel and has a diameter of .25 in. if the springs are compressed 0.5 in when the temperature of the rod is T=40F, determine the force in the rod when its temperature is T=160 F.
An electron has an initial velocity with an x component of zero, a y component of 9.35 km/s, a z component 16.1 km/s, and a constant acceleration of 1.60 x 1012 m/s2 in the positive x direction in a region in which uniform
Break Even Stripping Ratio (BESR), Given an underground total mining cost of $8.85 per tonne, surface mining costs of $2.95 per tonne of ore, and surface mining stripping costs of $1.75 per tonne of waste
A small community wishes to construct an activated sludge wastewater treatment plant to treat their wastewater. the wastewater from the community has an average flow rate of 0.0022 m^3/s (190 m^3/day) and an influent substrate concentration of 250 mg..
A piston-cylinder device contains 3 ft3 of air at 60 psia and 150°F. Heat is transferred to the air in the amount of 40 Btu as the air expands isothermally. Determine the amount of boundary work done during this process.
That certain structure measuring 100' X 150', sits on a plot of land with an elevation of 95.0' but a 100.5' floor elevation is required. How much sand and gravel have to be hauled to the site?
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