Calculate the aerosol scavenging coefficient ^ as a function of the diameter d of the scavenged particle over a size range of P 0.01 -0.1μm diameter for drops of diameter D = 5mm P falling at their terminal velocity in the air at 25°C. Assume that P = 1mmh¹ 0

Which of the following is not an apparatus or supplies for the Plastic Limit O flat glass plates for mixing soil and for rolling threads ) Distilled water O A length of rod 3 mm in diameter and 100 mm long ) Casagrande apparatus Based on the below data from a sieve analysis test, what is the cumulative percent retained above 1.25 mm sieve: Sieve Mass Size Retained 5.00 mm 10 2.50 mm 40 1.25 mm 30 630 pm| 120 315 um 12 8 160 μm Pan O 64% 36% O 22.5% O77.5% The hydrometer method is based on Stokes equation for the velocity of a freely 8 (Ctrl) - falling sphere. True False

Derive the equation for effluent tracer concentration from a CFSTR. Assume a step-input tracer test. Start your derivation by writing the mass balance equation.

What diameter would a circular clarifier have to be to remove 50 μm particles with 75% efficiency from a 4 MGD (million gallon per day) flow?  Assume the particle specific gravity is 1.5 and the temperature is 10°C.  Answer: 18 m

Explain the particle velocity distribution curve in Type-1 settling of particles with non- uniform diameters. If the fraction removed in the particle velocity distribution curve is represented by the equation below, what are the components of the total fraction of particles removed? Fraction removed = (1 - Fo) + -Fo V [²³: Vo dF

A hydrometer test has the following result: Gs = 2.65, temperature of water = 26 C, and L = 10.4 cm at 45 minutes after the start of sedimentation (see Figure 2.25). What is the diameter D of the smallest-size particles that have settled beyond the zone of measurement at that time (that is, t = 45 min)? Figure 2.25 ASTM 152H type of hydrometer placed inside the sedimentation cylinder (Courtesy of Khaled Sobhan, Florida Atlantic University, Boca Raton, Florida)

If 19.3mL of the standardized Na2S203 solution was used in determining the DO, what is the DO concentration of the water sample? 47 O 4.3232mg/L O 35.8208mg/L O 2.0072mg/L O 23.7776mg/L

Table 1 shows the result of the sieve analysis for the material of asphalt concrete (AC) mixture. Analyze the result of the sieve analysis by plotting the gradation curve of the sample. Conclude either the sample that been sieve is fulfill the requirement or not? Q4. Table 1 Sieve size (mm) Mass retained (g) Gradation limit for AC 14 20.0 0.00 100 14.0 69.60 90- 100 10.0 296.10 76- 86 5.00 433.70 50 - 62 3.35 170.50 40 - 54 1.18 321.20 18 - 34 0.425 212.00 12 - 24 0.150 135.10 6- 14 0.075 49.30 4-8 PAN 72.80

Hello can you help me solve this. Calculate the suspended solids in mg/L given the following data: Weight of crucible: 21.0256 g, Weight of crucible and dry solids: 21.0301 g, Weight of crucible and ash: 21.0263 g, and Volume of sample filtered: 50 mL. Answer should have 2 significant figures.

1.6 What is the density of a metal sample if a15.12-g sample is added into a graduated cylinder increased the liquid level from 35.00 mL to 40.60 raL?