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A person may demonstrate observable effects on the central nervous system when exposed to carbon monoxide at a concentration of 50 ppm, may lose consciousness at a concentration of 250 ppm, and may die at a concentration of 750 ppm. A "typical" urban environment produces carbon monoxide at a rate of 1.2 L/m2-hr. If a temperature inversion forms over the city at a height of 0.70 km, how long will it take the carbon monoxide concentration to reach 50 ppm if the wind velocity is zero? If the wind velocity is 1 m/s, what steady-state concentration of CO will be observed? Assume that the city is approximately square, 20 km on each side.
How to detect eror in line of collimation and what does line of collimation means.
After 5 seconds the force is continuous at the 50 N level. Determine the velocity of the cart at t=8 seconds and calculate t at which the cart velocity is zero.
A stockpile of gravel that has a water content of 6% is rained on so that its water content increases to 9%. Compute the difference in the weights of dry gravel in a 10 ton truckload taken from the pile before and after the rain.
calculate the amplitude F0 of the sinusoidal excitation force that is necessary to produce a steady-state vibration with a velocity amplitude of 10 m/s at resonance. what is the corresponding amplitude of the acceleration
A three-span continuous beam ABCD with three equal spans supports a uniform load with intensity q. Determine all reactions of this beam and draw the shear force and bending moment diagrams labelling all critical ordinates.
A sample of dry soil is mixed uniformly with 16 wt% water and then compacted into a cylindrical mold in the laboratory. The volume of moist soil is 1x10-3 m3 and its mass is equal to 1.60 kg.
What are the important findings in Austin Road Co. v. OSHRC and Builders Steel Co. v. Marshall? Your response should be approximately 200 - 300 words and include a reference citation for your response.
Determine the cycle time for a single engine scraper rated at 21 cy heaped that is used to haul material from a pit to a fill 900 ft away under severe conditions.
Need to design a cantilever retaining wall 8m high, saturated unit weight is 16kn/m 3 , surcharge is 7kn/m 2 , load above wall supported on wall stem
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid. The static moment of the plate with respect to the surface of the liqui..
An industry is illegally dischargingbenzeneinto a river. The concentration in the river atthe point of discharge is 0.2mg/L. A drinking water treatment plant (DWTP) is located 1.5km downstream. The watervelocity in the riveris 0.35km/day.
Two strips of a plastics material are bonded together as shown. The average shearing stress in the glue must be limited to 1000 kpa.
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