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Gas stoves emit CO and this can become an indoor health hazard. Consider an energy efficient 595 m 3 home with 0.03 ai r exchanges per hour infiltration rate. Suppose the power goes off one winter and you turn the oven and 2 burners on to heat the kitchen to stay warm. The CO concentration of outside air is 0 .0 ug / m 3 and initially there is no CO in the home either . As sume that the air is well mixed in the house. The oven emits 1900 mg/hr and each burner emits 1840 mg/hr.
a . The oven and two burners are on for 4 hours from 3 - 7 PM. Estimate the CO concentration in the home at 7 PM.
b. What is the steady state CO concentration? c. Given the steady state CO mixing ratio in part above (assume 1 atmosphere pressure and 288 K) what is the resulting %COHb and what is the health impact if exposed to this concentration overnight while you slept ?
Ethylene enters a turbine at 10 bar and 450 K, and exhausts at (atm) and 325 K. For mass flow in = 4.5 kg s^-1, determine the cost C of the turbine. State any assumptions you make. Data: H1 = 761.1 , H2 = 536.9 kg^-1, C/$ = (15,200)(1W1/kW)^0.573
suppose helen deposits $4000 today and one year from today she deposits $1000. Each year she increases her deposit by $500 until she makes her last deposits on roberta's 18 birthday. how much is on deposit after the 18th birhday
Property rights along bodies of water vary from the the thread of the stream to high water marks, and is based upon the navigability of the body of water and state law (true or false)?
determine the neutral axis angle given x and y deflection measurements and load applied (mm)
Each week 85 trucks bring a total of 2,180 metric tons of municipal solid waste (MSW) to the landfill. Each truck averages two loads per day. Each truck has a capacity of 4.5 metric tons and they operate 5 days/week.
How many moles of aluminum do 5.2×1024 aluminum atoms represent?
The structure consists of a wood frame with plywood roof deck, wall sheathing and floor deck. general form of the building construction is to be determined by the designer.
The 70 m tall tower is supported by three cables that exert forces FAB, FAC, and FAD on it. The magnitude of the force FAB is 2 kN. The x and z components of the vector sum of the forces exerted on the tower by the three cables are zero. What are ..
Aluminum ion (Al3+) is present in an industrial wastewater at 3 mg/L. The treatment facility wants to precipitate out the aluminum until there is only 0.2 mg/L remaining. What pH is required to acheive this aluminum ion concentration
Draw the shearing force diagram and the moment diagram of the following problem. The beam is indeterminate. You need to integrate the moment twice to get a formula for the deflection v(x).
The grade of the highway, Suppose that a highway rises a distance of 269 feet in a horizontal distance of 2647 feet.
A large tank is used to calibrate the reading from a flow meter. Measurements of the system weight as a function of time are made. Water enters the tank vertically from the flow metering system at a speed of 20 ft/sec through a 1.5 in.
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