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Korvikt [17]
3 years ago
11

A temperature of 20°c is equivalent to approximately

Physics
2 answers:
Yanka [14]3 years ago
8 0
C would be your answer
Nastasia [14]3 years ago
3 0
The answer is c 68 degree
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Poorly treated municipal wastewater is discharged to a stream. The river flow rate upstream of the discharge point is Qu/s = 8.7
Musya8 [376]

Answer

given,

Q u  = 8.7 m³/s

Q d= 0.9 m³/s

BOD concentration = 50 mg/L

a) BOD concentration at the down stream

C_{down}=\dfrac{0.9\times 50}{8.7+0.9}

C_{down}=\dfrac{0.9\times 50}{9.6}

               = 4.69 mg/L

b) discharge = 9.6 m³/s

cross sectional area = 10 m²

velocity steam = \dfrac{8.7+0.9}{10}

                        = 0.96 m/s

time taken to move 50 km down stream =\dfrac{50 \times 1000}{0.96}

                                                                  = 52083.3 s

                                                                  = \dfrac{52083.3}{3600\times 24}

                                                                   = 0.6 days

now,

C_t=C_0e^{-kt}

C_t=4.6875\ e^{-0.2\times 0.6}

C_t = 4.16 mg/L

5 0
4 years ago
Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen?
Korvikt [17]
Hydrogen is an element made of only one kind of atom
5 0
3 years ago
Read 2 more answers
Part 1: What is your Reaction Time?
nlexa [21]

Answer:

1. A ruler is a common instrument used for measuring the length of small objects

2. The acceleration due to gravity at the surface of Earth is about 9.8 metres per second per second.

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3 years ago
Which item has the most potential energy
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In the world or do you have a list?
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A 6.00-kg crate slides down a ramp from rest. The ramp is 1.00 m in length and inclined 30.0° above the horizontal. The crate ex
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Answer: a) V = 9.81 m/a

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c) V2 = 8.29m/s

d) Yes. The speed reduces.

Explanation:

Please find the attached files for the solution

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3 years ago
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