Consider a house into which radon is emitted through cracks

Assignment Help Civil Engineering
Reference no: EM13384168

Consider a house into which radon is emitted through cracks in the basement. The total volume of the house is 650 m3 (assume that the volume is well mixed throughout). The radon source emits 250 pCi/s (A picoCurie [pCi] is a unit proportional to the amount of radon gas and indicates the amount of radioactivity of the gas). Air inflow and outflow can be modeled as a flow of clean air into the house of 722 m3/h and an equal air flow out. Radon can be considered to be conservative in this problem. First find the retention time of the house.

Reference no: EM13384168

Questions Cloud

Which pair would be least diffcult to separate by : consider the following ksp values for metal sul?desmgc2o4 8.6 times 10-5coc2o4 2.7 times 10-9cuc2o4 2.9 times
Consider a sample that is a mixture composed of biphenyl : consider a sample that is a mixture composed of biphenyl benzoic acid benzyl alcohol. the sample is spotted on a tlc
One hundred grams of water is saturated with nh4clat 50 : one hundred grams of water is saturated with nh4clat 50 degrees c. according to table g if the temperature is lowered
If an iron scoopula instead of a plastic one is used to : if an iron scoopula instead of a plastic one is used to add unknown metal to hcl solution will it affect the calculated
Consider a house into which radon is emitted through cracks : consider a house into which radon is emitted through cracks in the basement. the total volume of the house is 650 m3
Hw many grams of ethylene glycol automobile antifreeze rm : how many grams of ethylene glycol automobile antifreeze rm c2h6o2 dissolved in 3.30 rm kg of water is needed to lower
How does hcl affect the change in temperature at constant : how does hcl affect the change in temperature at constant volume in naoh solution? what kind of relationship? linear or
A 480 g nugget of pure gold absorbed 298 j of heat what was : a 4.80 g nugget of pure gold absorbed 298 j of heat. what was the final temperature of the gold if the initial
An equal-tangent crest vertical curve has a 50 mih design : an equal-tangent crest vertical curve has a 50 mih design speed. the initial grade is 3. the high point is at station

Reviews

Write a Review

 

Civil Engineering Questions & Answers

  Determine the density in si unit of brass

The specific weight (wt./Vol.) of brass is 520 lb/ft^3. Determine its density (mass/vol.) in SI units. Use an appropriate prefix.

  Determine the pressure in the tank indicated by strain gage

The cylindrical wall of the tank is 6mm thick, has a 600mm inside diameter, and is made of steel with E = 200 GPa and v = 0.30. Determine the pressure in the tank indicated by a strain gage reading of 280*10^-6 in/in.

  What is the hydraulic residence time of the reactor

for sizing the syst em, the mean cell residence time is selected to be 5 days. the reactoer kinetic constants are u max= 2.4 d^-1 (1/day), Ks=75 mg/L as COD, Y=0.4 VSS/g COD and Kd=0.096 d^-1(1/day)

  Choose the technique that is best suited for the problem

given f(x) = -2x^6 - 1.5x^4 + 10x +2. use a root location technique to determine the maximum of this function. perform iterations until the approximate relative error falls below 5%.

  What is the ratio of the strain energy u1 in the tube

a thin walled circular tube and a solid circular bar of the same material are subjected to torsion. the tube and the bar have the same cross-sectional area and the same length.

  How many holes are required to break 250000 tons

Conduct a powder factor design for the following conditions: -Rock is iron ore; density is 5370 lb/cubic yards -Rock swells 60% from in situ when broken -Bench height is 45ft -Drill hole diameter is 12.25 inches

  What is the x-component of the electric field at p then

a coaxial cable consists of a long straight filament surrounded by a long coaxial cylindrical conducting shell assume charge Q is on the filament zero net charge is on the shell and the electric field is E at a particular point P

  Determine vertical stress increment due to the strip load

Soil with a unit weight of 19.65 kN/m^3 is loaded on the ground surface by a strip load of 1.5 m wide. The strip load is 365 kN/m of wall length. Determine the vertical stress increment due to the strip load and the total pressure

  Calculate the over all heat transfer coefficient

House chilled water is available for cooling coming from 6-in dia. chilled water line carrying chilled water at approximate constant 40 degree F temperature. Chilled water pressure in the 6-inch line is 110psig.

  Find size of tank that has to be designed for water supply

(i) volume to supply the peak demand of 1.8 times the average demand. (ii) volume to supply fire flow for at least 9 hours, and (iii) volume to supply emergency storage 600 L/day/capita. (1 L = 0.001m^3)

  What is effect of packing factor in self compacting concrete

what is effect of packing factor in self compacting concrete?

  What is the maximum exiting velocity and maximum height

A fireman reduces the exit area on a nozzle so that the velocity inside the hose is quite small relative to the exiting velocity. What is the maximum exiting velocity and what is the maximum height

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd