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Annual maintenance cost for a particular section of highway pavement are $2000. The placement of a new surface would reduce the annual maintenance cost to $500 per year for the first 5 years and to $1000 per year for the next 5 years. After 10 years the annual maintenance would again be $2000. If the maintenance costs are the only saving, what investment can be justified for the new surface? Assume interest at 4%.
A drunk driver in a 2200kg car plows into a 2100kg parked car with its brake set. Police measurements show that the two cars skid together a distance of 28m before stopping.
A finished 2 x 4 timber (actual size 1 5/8 in. x 3 1/2 in. x 10 ft long) is used as a fixed-end, fixed-end column. If the modulus of elasticity for the timber is 1600 ksi and a factor of safety of 3 with respect to failure by buckling is specified
A 3 kg mass is attached to one end of a 1 m long cord. The other end of the cord is attached to the center of a rotating disk (with radius greater than 1 m) that has a very large constant angular velocity.
The 3.5mg engine is suspended from a 500 kg spreader beam and hoisted by a crane which gives it an acceleration of 4m/s^2 when it has a velocity of 2m/s. determine the force in chains AC and AD during the lift.
the 3.5mg engine is suspended from a 500 kg spreader beam and hoisted by a crane which gives it an acceleration of 4m/s^2 when it has a velocity of 2m/s. determine the force in chains AC and AD during the lift.
If you were asked to perform an excavation contract competitively with limited data, what type of contract would you want and why?
Determine the strain components strainx, Strainy, and gammaxy, then sketch the deformed shape in the xy orientation, paying particular attention to the sign of the shear deformation.
determine critical depth in a circular pipe of 36 inches diameter and roughness coefficient of 0.015 The flow rate is 15 cfs , So = 0.002
Oil (SAE 30) flows between parallel plates spaced 5mm apart. The bottom plate is fixed, but the upper plate moves with avelocity of .2 m/s in the positive x direction. The pressuregradient is 60 kPa/m, and is negative.
A 2 m high sandy fill material was placed loosely at a relative density of 47%. Laboratory studies indicated tht the maximum and minimum void ratios of the fill material are 0.92 and 0.53, respectively.
What is the ratio of the magnitude of E2 to the magnitude of E1? You may neglect the effects of gravity on the proton.
The 10-lb lamp fixture is suspended from two springs, each having an unstretcfhed length of 4 ft and stiffness of k=5lb/ft. Determine the angle theta for equilibrium.
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