Calculate the 8-hour time-weighted average twa exposure to
Calculate the 8-hour time-weighted average (TWA) exposure to benzene for the employee in milligrams per cubic meter (mg/m3.) Use the formula:
8hr TWA = (C1T1 + C2 T2) ÷ Tt
Expected delivery within 24 Hours
A Zamboni used to clear an ice skating rink is operated for 15 minutes and emits 200 g/min of CO. The skating rink has a volume of 30,000 m3, and a ventilation rate of 350 m3/min. Assume that the CO concentration in outdoor air is negligible and that
Arsenic is released from an industrial stack at a rate of E=6 g/s. The effective height release is H = 50m. The mean wind speed is u = 3 m/s. Predict the ground-level arsenic concentrations 5 km downwind of the stack for two stability classes: B (mod
Design and implement a simulation in C of 2-10 interacting atoms or molecules. The atoms or molecules must move in space, they can collide and bounce off of each other. They can also possibly combine based on relative charge.
Consider the initial value problem y'= -2xy , y(0) ? 2 . Apply Euler’s method to approximate this solution on the interval (0,0.5) with step size h=0.1. Apply the improved Euler method with step size h=0.1.
Calculate the 8-hour time-weighted average (TWA) exposure to benzene for the employee in milligrams per cubic meter (mg/m3.)
Two confined aquifers are separated by an aquitard as shown in the diagram. The piezometric head difference between the upper and lower aquifer measured along a vertical line is 6.5 m. If the vertical hydraulic conductivity of confining unit is 0.046
A survey of 145 college students was done to determine their majors. Let A= the set of those majoring in art, B= the set of those majoring in biology, and C= the set of those majoring in computer science.
Tish entered into a contract with Michelle, in which Michelle would redecorate Tish's bedroom to incorporate more lighting and pastel colors. The contract provided that Michelle would perform the duties in a "satisfactory and timely manner." When the
Based upon the “rule of law” and its limits on public administrators, explain why a public administrator should not falsely conclude that they necessarily can alter human behavior merely by passing a law. Morality varies across and within
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