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Determine the payback period for an asset that has a first cost of $40,000, a salvage value of $8000 anytime within 10 years of its purchase, and generates income of $6000 per year. The required return is 10% per year.
A one-way solid concrete slab is to be used for a simple span of 16 ft. In addition to its own weight, the slab carries a superimposed dead load of 50 psf and a live load of 75 psf.
The pipes holding the boards were placed 10 ft apart across the dam. There were 20 pipes and each one was designed to fail under a bending moment of 1625 ft-lb how deep will the water be on the flash boards when failure occurs
Assuming a standard driver reaction time of 2.5 seconds, what is the probability that the vehicle pulling out will get in an accident with oncoming traffic?
Describe mathematically and explain the Principle of Linear Impulse and Momentum. What is Conservation of Linear Momentum and how is it related. What is the difference between Linear Momentum and Angular Momentum.
Determine the shear stress in a 25 × 50 cm rectangular section if the shear force is 20 KN and torsional moment is 10 KN m at service loads. Assume M20 mix and 0.75% tension reinforcement at an effective cover of 50 mm.
Water with a static pressure of 1.96kN/M2 flows through an 800 mm diameter pipe. A pitot tube pressure gage in this pipe reads a pressure of 5.88 kN/M2. How do you determine the volume flow rate (Q) of the water? (Q = 1.40 M^3/sec, V=2.79 M/sec)
The coefficient of friction between the crate and the floor is µs = 0.4 and µk = 0.3. If P is slowly increased until the crate starts to move and then remains constant, determine using energy methods the speed of the crate after moving 2 m.
If the BOD5 of a municipal wastewater is 310 mg/L and the BODU is 340 mg/L, determine the BOD reaction rate constant (base e). What would be the 3 day 30°C BOD Assume, temperature coefficient = 1.047.
Two new rides are being compared by a local amusement park in terms of their annual operating costs. The two rides are assumed to be able to generate the same level of revenue (and thus the focus on costs).
If a car engine is turning at 4000 rpm, the transmission gear ratio is 3:1 and the final drive ratio is 4:1. (a) what is the speed in rpm of the car wheels and (b) the vehicle speed if the tire radius is 8 inches
The flow rate of water flowing in a 3m wide channel is to be measured with a sharp-crested triangular weir 0.5m above the channel bottom with a notch angle of 60°. If the flow depth upstream from the weir is 1.5m
Bridge scour, Determine the magnitude of the contraction scour depth given the following information about the channel and bridge
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