Calculate ultimate BOD. If the BOD 5 is 100 mg/L and the reaction rate constant is 0.115 d-1 (at 20°C), what is the ultimate BOD? P
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Q: The 5 day BOD of a water sample is 75 mg/l and has a reaction rate constant of 0.345/day. Compute…
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Q: Q/ If the 5-day 20°C BOD is 150 mg/l what world be it's 8-day 15°C BOD? Assume the deoxygenation…
A: Given: 5-day BOD at 20 oC = 150 mg/L Deoxygenation constant k at 20 oC = 0.23 /d The value of 8-day…
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Q: The following information is given for n-pentane at 1 atm:boiling point = 36.20°C ΔHvap (36.20°C) =…
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- Q/ If the 5-day 20°C BOD is 150 mg/l what world be it's 8-day 15°C BOD? Assume the deoxygenation constant k at 20°C is 0.23/d.In an ore - mixing operation , a bucket full of ore is suspended from a travelling crane which moves along a stationary bridge . The bucket is to swing no more than 10 ft horizontally when the crane is brought to a sudden stop . Determine the maximum allowable change in Potential Energy per unit mass in ft-lb f /lb m for a given maximum speed v of the crane .An atomizer forms water droplets 45μm in diameter. Determine the excess pressure within these droplets using σ=0.0712N/m
- If the 5 days 20c BOD is 150 mg/l what world be its 8 days 15c BOD ? Assume the deoxygenation constant at 20 c is 0.23/d.If the reaction rate coefficient of BOD is 0.3 1/d at 20 oC, what will it be if the temperature is raised to 30 degree C?The following information is given for n-pentane at 1 atm:boiling point = 36.20°C ΔHvap (36.20°C) = 357.6 J/g melting point = − 129.7°C ΔHfus (−129.7°C) = 116.7 J/g specific heat gas = 1.650 J/g ⋅ °C specific heat liquid = 2.280 J/g ⋅ °C A 26.10-g sample of liquid n-pentane is initially at −51.40°C. If the sample is heated at constant pressure (P = 1 atm), how many kJ of energy are needed to raise the temperature of the sample to 65.30°C?
- A centrifuge bowl with internal diameter of 150mm is turning at 8000r/min is used to separate chlorobenzene, with a density of 1109 kgm3, from an aqueous wash liquid having a density of 1020 kgm3. The free liquid surface inside the bowl is 40mm from the axis of rotation. If the centrifugal bowl is to contain equal volumes of the two liquids, what should be the radial distance from the rotational axis to the top of the overflow dam for heavy liquidAn atomizer forms water droplets 45μm in diameter. Determine the excess pressure within these droplets using σ = 0.0712 N/m.A circular cylinder 400 mm in diameter and 750 mm long has 600 mm of its length submerged in kerosene (S.G. = 0.823). What is the specific weight of the cylinder? a. 1.86 KN/m° C.) 0.608 kN/m3 b. 6.45 kN/m3 d.) 0.805 kN/m3
- A sample of gas occupies 3.75 L at 1.15 atm and 25 °C. At what temperature will it occupy 4.00 L at 1.00 atm? Initial: Final: Effect:A 10-kg mass of superheated refrigerant-134a at 1.2 MPa and 70°C is cooled at constant pressure until it exists as a compressed liquid at 20°C. (a) Show the process on a T-v diagram with respect to saturation lines. (b) Determine the change in volume. (c) Find the change in total internal energy.Determine the mass density, specific weight, and specific volume of CO2 contained in a vessel at a pressure of 800 kN/m2 and temperature 25°C.