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Radon from well water may pose a radiological health hazard. One treatment technique is simply to hold the water in storage, allowing the radon to decay. The decay rate is first order: Rn?>products;k=0.16day^?1 Consider a situation in which water is delivered from a well to a household at a rate of 0.8m3day?
1. The radon concentration is to be reduced by storage to 6 percent of its level in the untreated supply.
a) How large must the storage tank be if it acts as a plug-flow reactor?
b) How large must the storage tank be if it actss as a completely mixed flow reactor?
c) If the storage tank system consists of two identical CMFRs in series, how large must each be to achieve the desired level of control?
i want to know how to draw bending moment diagram for this shape and the value of the moment in critical sections
If the pressure in pipe B is decreased 10 kPa and the pressure in pipe A remains unchanged, determine the new reading along the inclined leg of the mercury manometer.
Two forces are applied as shown to hook support. Knowing that the magnitude of P is 35 N, determine by trigonometry (a) the required angle a if the resultant R of the two forces applied to the support is to be horizontal, (b) the corresponding magnit..
Some distance downstream, the velocity profile can be (very) roughly approximated by a region inside the wake with u = U/2 and an exterior region with u = 3U/2.
Clouds can weigh thousands of pounds due to their liquid water content. Often this content is measured g/m^3. Assume that a cumulus cloud occupies a volume of one cubic km, and its liquid water content is 0.2g/m^3.
A room has a floor area of 500 m^2 and a height of 4 m. THe room is involved in a fire with a constant energy release rate of 1 MW. calculate the time till the smoke layer is 1.5 m from the floor for (a) the case where the leakage areas are at the ..
A rectangular channel carries a discharge of 2.00 m3/sec per meter of channel width over a weir crest that is 1.4 m in height. The energy grade line upstream of the weir measure 2.7 m above the channel bottom.
. In order to get full credit for this problem you must list all unknown species that would exist in the raindrop and all pertinent equations regardless of their level of significance. You must algebraically solve the equations to determine pH.
A ping-pong ball (diameter = 40mm, weight= .03 N Volume =4piR^3/3) is released from the bottom of a swimming pool. What is the terminal velocity of the ping pong ball in the water
A flow of 28 m3s-1 occurs in an earth-lined canal having a base width of 3 m, side slopes of 1(vertical) to 2 (horizontal) and the Manning's n value of 0.022. Calculate the critical depth and critical slope.
A barge measures 10 ft (depth) by 35 ft by 120 ft and weighs 100 U.S. tons. The barge floats in fresh water (specific weight = 62.4 lb/ft3) and is evenly filled with 38,000 bushels of corn (60 lb/bushel).
The US EPA has published the following data for the release to the Florida environment of sulfuric acid (H2SO4 ), the most widely used industrial chemical (in millions of pounds).
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