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Imagine two small towns of 1,000 people: Blacktop and Parktown. In the urban sprawl that is Blacktop, all the residents own fuel-efficient cars (15 km/liter) and travel an average of 20,000 km per year. Over in Parktown, the situation is somewhat different. Good public transport and well-planned amenities mean that only half the inhabitants need a car. Those that do own a car tend not to need it so often and therefore replace it less frequently. Each car-owner drives an average of 10,000 km per year. However, their older-model vehicles are less fuel efficient (10 km/liter) than those in Blacktop. Which community’s transportation is more environmentally sustainable?
The initial concentration of carbon in the metal is 0.1wt%. We first do an experiment by applying a concentration of 5%wt of carbon at the surface of a similar slab and maintaining the system at 900 K for an hour.
a whirlpool is modeled as the combination of a free and a forced vortex. the maximum velocity in the whirlpool is 10 m/s, and the radius at the juncture of the free and the forced vortex is 10m.
At that time, there is no more fuel in the rocket engine and the rocket continues upwards in free fall (g=0 ft/sec/sec). (a) How high will the rocket reach before it begins to fall back to the campus
A tank with a volume of 5,000 gal contains salt solution at an initial concentration (C0*) of 70,000 mg/L, but the concentration in the tank (C) needs to be reduced to 500 mg/L. Two approaches are being considered
A flow of 600cfs is measured at a depth of 3.4 ft in trapezoidal channel with bottom width of 25ft and side slopes of 3:1(h:v). The channel reach has a slope of .002. Estimate the channel roughness.
What is the SI value of absolute pressure corresponding to a vacuum pressure of -10 inches of water. Assume the location is Moscow, Idaho. What is the SI value of gage pressure corresponding to a pressure 14 psia. Assume the location is Denver, Colo..
A trapezoidal channel with base width 5m and side slopes 2 horizontal to 1 vertical, slopes at 0.0005. If n=0.010, what is the flow rate for a normal depth of 1m, 2m, 4m
A projectile is fired with an initial velocity of 800 ft/s at a target B located 2000 feet above the gun A and at a horizontal distance of 12,000 feet. Neglecting air resistance, determine the value of the angle at which the projectile is fired.
of 2640 psi with a factor of safety of 2.0 with respect to yielding. the yield stress of the steel is 65,000 psi in tension and 32,000 psi in shear. the diameter of the tank is 7.0 in. the minimum required wall thickness is 0.289 in.
For a circular curve with a radius R of 400 meter, what is the degree of curve by (a) arc definition and (b) chord definition
For a rubber component that, in its final form is to be vulcanized, should vulcanization be carried out prior or subsequent to the forming operation? Why?
A square footing 2 meters by 2 meters is to be constructed 1.22 meters below the ground surface. The groundwater table is located 1.82 meters below the ground surface. The subsoil consists of a uniform, medium dense, cohesionless soil with the follow..
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