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an average vehicle puts out nearly 20 lbm of carbon dioxide into the atmosphere for every gallon of gasoline it burns, thus one thing we can do to reduce global warming is to buy a vehicle with higher fuel economy. a U.S. government publication states that a vehicle that gets 25 rather than 20 miles per gallon will prevent 10 tonsof carbon dioxide from being released over the lifetime of the vehicle. makeing reasonable assumptions, evaluate if this is a reasonable claim or a gross exxageration.
Water in a pip has a pressure of 22.1 lb/ft2. What is the pressure head?
inability and green engineering can be integrated in the four components of materials science and engineering?
An industrial plant presently discharges a chemical (W=2000 * 106 gr/yr) to the lake. In addition, the inflow stream also contains the same chemical at a concentration of 15 mg/L. Note that the volumetric inflow and outflow are equal.
A dam project specifies 97% compaction. Lab tests on the soil being used indicate that it has a maximum dry density of 1900 kg/m3 at an optimum water content of 13.2%. Field tests give the following results: Field dry density is 1790 kg/m3 and 16...
Determine the differential settlement between the centre line of the ring beam and under the centre of beam. The inner and outer radii of the ring beam are 8m and 12m respectively.
Consider the design of wastewater treatment plant for a community wiyh average daily and peak hourly wastewater design flows of 2.0 mgd. The raw sewage has an average of 230 mg/l BOD5 and 260 mg/l of suspended solids.
Find the time for one complete cycle of this motion if the spring constant is 21 N/m. (Assume that once the pendulum ball hits the spring there is no effect due to the vertical movement of the ball.)
The elastic ball bounces down a flight of rigid stairs. Determine the height h of the steps if all the trajectories between successive steps are identical. Use e=0.85 and the initial velocity 6 m/s.neglect friction.(teta=70 degrees)
A system consists of liquid oxygen in equilibrium with oxygen vapor. How many phases are present The system undergoes a process during which some of the liquid is vaporized.
Determine the projected component of the force fac along the axis of strut ao. Express the result as a cartesian vector.
For the data given below, derive the 2-hr unit hydrograph for a watershed having a drainagearea of 216 km^2, assuming a constant baseflow of 20 m^3/s.
What is the concentration of tracer in the reactor 1 h after tracer addition is terminated? The reactor had an initial concentration of tracer of 1.0 mg/L when tracer addition commenced.
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