b. If Q1(0) = 20 kg and Q2(0) = 10 kg, find the amount of solute in each tank after t minutes. Q1(t) kg Q2(t) = kg c. As t 0o, how much solute is in each tank? In the long run, Tank 1 will have kg of solute. In the long run, Tank 2 will have kg of solute.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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b and c

 

The flow system shown in the figure is activated at time t
0. Let Qi(t) denote the amount of solute present in the ith tank
at time t. Assume that all the flow rates are a constant 10 L/min. It follows that the volume of solution in each tank remains
constant; assume this volume to be 1000 L. The concentration of solute in the inflow to Tank 1 (from a source other than
Tank 2) is 0.4 kg/L, and the concentration of solute in the inflow to Tank 2 (from a source other than Tank 1) is 0 kg/L.
Assume each tank is mixed perfectly.
Tank 1
Tank 2
a. Set up a system of first-order differential equations that models this situation.
1
Q{
50
100
Q1
%D
1
1
Q2
100
50
Transcribed Image Text:The flow system shown in the figure is activated at time t 0. Let Qi(t) denote the amount of solute present in the ith tank at time t. Assume that all the flow rates are a constant 10 L/min. It follows that the volume of solution in each tank remains constant; assume this volume to be 1000 L. The concentration of solute in the inflow to Tank 1 (from a source other than Tank 2) is 0.4 kg/L, and the concentration of solute in the inflow to Tank 2 (from a source other than Tank 1) is 0 kg/L. Assume each tank is mixed perfectly. Tank 1 Tank 2 a. Set up a system of first-order differential equations that models this situation. 1 Q{ 50 100 Q1 %D 1 1 Q2 100 50
b. If Q1(0) = 20 kg and Q2(0) = 10 kg, find the amount of solute in each tank after t minutes.
Q1(t) =
kg
Q2(t) =
kg
c. As t → o, how much solute is in each tank?
In the long run, Tank 1 will have
kg of solute.
In the long run, Tank 2 will have
kg of solute.
You should reread the question and think about why your answer makes sense.
Transcribed Image Text:b. If Q1(0) = 20 kg and Q2(0) = 10 kg, find the amount of solute in each tank after t minutes. Q1(t) = kg Q2(t) = kg c. As t → o, how much solute is in each tank? In the long run, Tank 1 will have kg of solute. In the long run, Tank 2 will have kg of solute. You should reread the question and think about why your answer makes sense.
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