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A new sponge iron factory has an annual capacity of 100,000 tons/year of Iron production. Benzopyrene is produced during this process at a rate of 0.00006% of Iron produced. Due to high temperatures, 0.0003% Benzopyrene goes into the air. The space volume where iron smelting occurs is 100 m x 70 m x 7 m.
(a) The natural air flow rate to this industrial shade structure is 90 m3/hour. Determine the risk to the workers who work 8 hours/day, 50 weeks/year for 30 years. Assume workers are 75 kg and live for 70 years.
(b) What flow rate do you need to reduce the risk by 95%?
a bearing wall carries a dead load of 120kn/m and live load of 100 kn/m. It is to be supported on a 400mm deep continuous footing underlain by a medium sand (unit weight = 19.2 kn/m3, phi= 37 deg, effective c = 0).
The skateboard rider leaves the ramp at A with an initial Velocity Va at a 30 degree angle. If he strikes the ground at B, determine Va and the time of the flight. x=5.1m
A stack gas at 1.1 atmospheric pressure has a mixture below. what will be the change in partial pressure of carbon dioxide if the gas temperature is lowered from 2000 degrees K to 1000 degrees K
Determine the preconstruction and post construction vertical stress imposed on the soil at a point 2 m below the center of the foundation area (assume westergaard conditions applied)
A hydraulic jump occurs in a rectangular channel 4.0 m wide. The water depth before the jump is 0.4 m and after the jump is 1.7 m. Compute the flow rate in the channel, the critical depth and the headloss in the jump.
From an aerial photograph, one observes that on a level section of a (multilane) highway, 25% of the vehicles are trucks, 75% are cars, and there are 50 vehicles per mile of highway. The trucks travel at 40 mph and the cars at 60 mph.
A polystyrene rod consisting of two cylindrical portions AB and BC is restrained at both ends and supports two 6 kip loads. Knowing that E = 0.45 * 10^6 psi,
A 3-mm thick panel (1 m x 1 m) of aluminum alloy (k = 177 W/m. K, Cp = 875 J/kg. K, and p(rho)= 2770 kg/m3) is heated in a large oven with air at T = 175oC and a convective heat transfer coefficient of h = 40 W/m2.K.
An 8.5 m compacted fill is to be placed over the soil profile. Consolidation tests on samples from points A and B produced the following results. a) Calculate the consolidation settlement caused by the weight of this fill.
Each wheel of an automobile has a weight of 48 lb, a diameter of 23 in., and a radius of gyration of 9 in. The automobile travels around an unbanked curve of radius 450 ft at a speed of 65 mi/h.
If the time required to pay for parking is exponentially distributed with a mean of 15 seconds, find the average time in system.
Is it possible (in this part of the world) for the sun to ever shine directly upon the OUTSIDE of a NORTH-facing wall of a home or other building? If so when?
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