Answer:
a) 513775.5 m^3 ≈ 51.38 * 10^4 m^3
b) 256887.75 m^3 ≈ 25.69 * 10^4 m^3
Step-by-step explanation:
Given data :
Depth of pond = 2m
flow in the stream = 20 cfs = 4.8931 * 10^4 m^3/day
settling rate = 0.2 m/day
rate constant ( k )= 0.2 / 2 = 0.1 / day
steady-state removal of the solids required = 65%
<u>A) determine size of a single CSTR to achieve 65%</u>
First determine the time required to achieve this using the relation below
C =
∴ t =
= ( -1 / 0.1 ) * (- 1.05 ) = 10.5 day
The size of a single CSTR required = ( 4.8931*10^4 ) * (10.5 ) = 513775.5 m^3
<u>B) determine the sizes of a pair of identical CSTRs in series needed to achieve the desired removal</u>
sizes of a pair = 513775.5 / 2 = 256887.75 m^3
Answer:
(A) x=5
Step-by-step explanation:
- The length of the pool is 20 feet,
- The width is (20 minus x) feet; and
- The area of the pool is 300 square feet.
Area = Length X Width
300 =20(20-x)
Opening the bracket on the right hand side
300 =400-20x
20x=400-300
20x=100
Divide both sides by 20
x=5
The value of x=5
Answer:
Never gonna
Step-by-step explanation:
give you up,
Let you down,
make you cry
Run around and desert you
Answer:
They have the same range of 60.
Step-by-step explanation:
85-25=60
188-128=60
From the given situation above, we form a right triangle with legs equal to the height of the tree and the length of the shadow it casted. The hypotenuse is the length from the tip of the tree to the tip of the shadow.
The angle at which the ray of the sun hit the ground is that which has a tangent equal to 100 / 150 or 2/3. This angle is equal to 33.69. Thus, the answer is letter B. 34°.