a) What is the volumetric flow rate of air exiting the building assuming steady state,air as an ideal gas and no significant pressure difference between the inside and outside of the building?
b)Determine the number of building air volume changes per hour.
c)If you need to meet the CDC guidance for airborne contaminant removal at 2 ACH, do you need to change the ventilation for the building?
2) A 12 oz. mug of coffee contains 200 mg of caffeine. Caffeine is eliminated from the body at a rate of dmcaf/dt = -0.116mcaf, where mcaf is the mass of caffeine in the body in mg and t is in hours. After you chug a 12 oz. coffee, how long will it take for the caffeine in your body to drop to 100 mg? You drink one mug at 6 am and another at 2 pm.
a) Plot the caffeine content of your body as a function of time for a 24 hour period.
b) What is the level of caffeine in your body at 11 pm? If you are having trouble falling asleep at 11 pm, would it help to cut out the second coffee?
Fig: 1