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What concentration of Ozone is sometime used as a disinfectant for drinking water. Ozone is highly reactive it will react benign species found in water, as well as the pathogens it is intended to kill. It found that ozone reaction in water nearly follows first-order kinetics in ozone concentration, such as that its concentration decreases by 50 percent in 12 minutes (t1/2 = 12 min). A water supplier wants to inject ozone into a piper bringing water to the water treatment plant to predisinfect the influent. The 3.0-ft diameter piper is 3,400 feet long with a steady flow rate of 10,000 gal/minozone (in mg/L) should be Injected at the head of the piper so what there will be an ozone concentration of 1.0mg/L at the piper’s exit into the plant? The piper may be realistically assumed to act as an ideal PFR.
two sedimentation tanks operate in parallel. The combined flow to the two tanks is .1 m^3/s. the depth of each tank is 2 m and each has a detention time of 4 h.
A photograph is taken of a transverse wave travelling along a length of rope. At this instant the shape of the wave is described by y = (2 m) sin ((0.8 rad.m-1)x+0.8 rad). The speed of the wave is 2 m/s. Calculate the distance between two successi..
The compound beam assembly shown is made up of 4 members connected by pins and is supported by hinges/pins at A and E. L= 2.6m (L is the lengthD to E) , and w= 60 (w is the load-lines) .
The partial pressure of the gasses in a 22,414-L volume of air at STP are: oxygen, 21,224 kPa; nitrogen, 79,119 kPa; argon, 0.946 kPa; and carbondioxide, 0.036 kPa. Determine the gram molecular weight of air.
what is the magnitude and direction of the force of the water n the nozzle, if the nozzle is held steady/2- what is the FORCE if the fire fighter is running towards the fire, with the hose at a velocity of 1.5 m/s
A wrought iron water line connecting two reservoirs at 20°C has a length of 1500 m, a diameter of 75 cm, two elbows (90º, long-radius, flanged), a fully open gate valve, and a reentrant pipe entrance.
An electronics firm has a contract to deliver the following number of ratios during the next three months; month 1, 200 radios; month 2; 300 radios; month 3, 300 radios. For each radio produced during months 1 and 2, a $10 variable cost is incurred; ..
A company that manufactures regenerative thermal oxidizers made an investment 10 years ago that is now worth $1,300,000. How much was the initial investment at an interest rate of 15% per year (a) simple interest and (b) compound interest?
Find the velocity of the air downstream of the restriction, and show that the enthalpy is essentially the same before and after the throttling process. Also find the change of entropy.
design a concrete (n = 0.013) channel that will convey 50,000 GPM. It is to be a trapezoidal in cross section with a bottom width of 7.5 feet. The side slopes are to be 1.33:1 (H:V) and it is desired to have the depth of flow constant at 2.0 feet.
If a tractor with 23-hp, a max speed of 3.6 mph in 1st gear and an effieiciency of 92% is operated operated down a 4% slope and the rolling resistance is 80 lb/ton, what is the maximum external pull in each of the 4 gears.
If the detention storage on the paved section is increasing at the rate of 60 m3/hr, what is the runoff rate into the inlet grate?
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