What is the minimum flow rate through a 4-in diameter pipe carrying carbon tetrachloride at 20°C that can be assured to be fully turbulent?

Explain what is meant by permeability and describe how to interpret the permeability ratings of vapor retarders.

Estimate the concentration of SOz in the urban air above city, if tthe mixing height above the city is 800m, the width of the box perpendicular to the wind is 12,000 m, the average annual wind speed is 8500 m/h, and the amount of SO2 discharged is 1200x10 pound per year. Pair =1.29 kg/m3,. Pso? = 0.89 kg/m2. Express the concentration in ppm, show a diagram.

A smooth concrete pipe with a 1.5 ft diameter carries carbon tetrachloride at 20 C from a tank to a facility 1 mile away, where it discharges into the air. The pipe begins in the tank 3 feet below the surface and descends on a 1:100 (vertical: horizontal) slope. Determine the flow rate, assuming minor losses are negligible.