As an employee of the los angeles air quality commission, you have been asked to develop a
mod...
![subject](/tpl/images/cats/User.png)
Engineering, 16.09.2019 14:30 18jweeks9
As an employee of the los angeles air quality commission, you have been asked to develop a
model for computing the distribution of no2 in the atmosphere. the molar flux of no2 at the
ground level ,0,
′′ is presumed known. this flux is attributed to automobile and smoke stack
emissions. it is also known that the concentration of no2 at a distance well above ground level is
zero and that no2 reacts chemically in the atmosphere. in particular, no2 reacts with unburned
hydrocarbons (in a process that is activated by sunlight) to produce pan (peroxyacetylnitrate), the
final product of photochemical smog. the reaction is first order, and ocal rate at which it
occurs may be expressed as = −kca(a) assuming steady-state conditions and a stagnant atmosphere, obtain an expression for the
vertical distribution ca(y) of the molar concentration of no2 in the atmosphere.
(b) if an no2 partial pressure of pa = 2*10-6
bar is sufficient to cause pulmonary damage, what
is the value of the ground level molar flux for which you would issue a smog alert? you
may assume an isothermal atmosphere at t=300 k, a reaction coefficient of k1=0.03 s-1
,
and an no2-air diffusion coefficient of dab = 0.15*10-4 m2
/s.
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.
Answers: 3
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
Prove the equivalence between the two statements of the 2nd law of thermodynamics (i.e., a violation of one statement leads to the violatio the other statement)
Answers: 2
You know the right answer?
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 25.02.2021 08:10
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.02.2021 08:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.02.2021 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 25.02.2021 08:10
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 25.02.2021 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 25.02.2021 08:10
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/fizika.png)
Physics, 25.02.2021 08:10
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 25.02.2021 08:20
![question](/tpl/images/cats/istoriya.png)
History, 25.02.2021 08:20