subject

Engineering, 21.12.2020 19:40 violetagamez2

The initial ultimate BOD after mixing of the Bergelmir River is 12.0 mg · L−1. The DO in the Bergelmir River after the wastewater and river have mixed is at saturation. The river temperature is 10◦ C. At 10◦ C, the deoxygenation rate constant (kd) is 0.30 day−1 , and the reaeration rate constant (kr) is 0.40 day−1 . Determine the critical point (tc) and the critical DO. tc = 2.88 days. Critical DO = 7.53 mg · L−1

ansver

Answers: 1

Show answers

Another question on Engineering

question

Engineering, 04.07.2019 16:10

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Answers: 1

question

Engineering, 04.07.2019 18:10

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

Answers: 1

question

Engineering, 04.07.2019 18:10

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

Answers: 2

question

Engineering, 04.07.2019 18:10

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

Answers: 1

You know the right answer?

The initial ultimate BOD after mixing of the Bergelmir River is 12.0 mg · L−1. The DO in the Bergelm...

Questions

question

History, 02.09.2019 07:10

What was the eisenhower doctrine? the united states would immediately try to liberate all of the countries behind the iron curtain. the united states...

question

Mathematics, 02.09.2019 07:10

Alison is playing a video game. at the end of each level, the player is given either a bag of gold or a magic wand. alison says that the probabi...

question

Mathematics, 02.09.2019 07:10

What fraction of 1 gallon is five cups...

question

World Languages, 02.09.2019 07:10

What is the name of the place where at once time almost everybody knew sign language?...

question

English, 02.09.2019 07:10

Story: first confession 1. the grandmother often gives nora a a. beating b. bullseye c. penny d. kiss 2. durin...

question

Mathematics, 02.09.2019 07:10

An equiangular triangle has three sides with different lengths....

question

Mathematics, 02.09.2019 07:10

87.99 rounded to the nearest tenths...

question

Biology, 02.09.2019 07:10

Where can the dna of bacteria be found?...

question

Health, 02.09.2019 07:10

Germs can be spread from a food worker even when the food worker looks and feels healthy. which of these is the best thing you can do as a food worker...

question

English, 02.09.2019 07:10

Which line in this excerpt from act 1 of shakespeare's romeo an juliet contains alliteration? romeo: like a rich jewel in an ethiopes ear; 1....

question

Geography, 02.09.2019 07:10

What is the largest part of the earth: the core, the mantle, or the crust...

question

Mathematics, 02.09.2019 07:10

The function f is continuous on the closed interval [0,6] and has values that are given in the table below. x |0|2|4|6 f(x)|4|k|8|12 the trapezo...

question

Computers and Technology, 02.09.2019 07:10

Mark for review (will be highlighted on the review page) 11. a feature in excel that allows you to graphically display in a single cell the trend acro...

question

Chemistry, 02.09.2019 07:10

What is the [h+] in a solution with poh of 0.253? 5.58 × 10−15 m 1.79 × 10−14 m 3.21 × 10−2 m 5.58 × 10−1 m...

question

Mathematics, 02.09.2019 07:10

Solve the equation g(x) =-5 for x if g(x) = -0.5x^2+3x+4. round to four decimal places...

question

Mathematics, 02.09.2019 07:10

How do you simpify the rational expression and state any excluded values. x^2-x-6/x+2a. x - 3, where x does not equal -2 b. x -3, where x...

question

Physics, 02.09.2019 07:10

What is the speed of a bobsled whose distance-time graph indicates that it traveled 119m in 27s...

question

Mathematics, 02.09.2019 07:10

If the federal reserve decreases the reserve rate from 4% to 2%, how does this affect the amount of money that would result because of fractional-rese...

question

World Languages, 02.09.2019 07:10

James makes $7.00 per hour. priya makes 40% more than james, and siobhan makes 5% less than priya. how much does siobhan make per hour?...

question

Mathematics, 02.09.2019 07:10

When you multiply a decimal by a power of ten, what is the relationship between the number of zeros in the powe of ten?...

More questions: Engineering Another questions

Questions on the website: 13722363