Consider the air over a city to be a box 100 km on two sides that reaches up to an altitude of 1.0km. clean air is blowing into the box along one of its sides with a speed of 4 m/s. suppose an air pollutant with a degradation reaction rate k = 0.2 hr-1 is emitted into the box at a total rate of 10.0 kg/s.

if the windspeed in this above problem suddenly drops to 1 m/s, estimate the concentration of the pollutant two hours later.

Explanation:

Consider the following image(attached)

input Rate=

To find the concentration,

Input rate= Output rate + Decay rate ...(1)

Output rate = Area x Velocity x concentration

Decay rate = reaction rate x Volume x C

Substitute the values in equation(1)

If wind speed is suddenly drops to 1m/s concentration of the pollutant two hours later:

Concentration:

Output rate = Area x Velocity x concentration

Decay rate=

Concentration after two hours

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

the right answer is 0.3 meters per second