
Fundamentals of Differential Equations (9th Edition)
9th Edition
ISBN: 9780321977069
Author: R. Kent Nagle, Edward B. Saff, Arthur David Snider
Publisher: PEARSON
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6. Modelling. Suppose that we have two tanks (A and B) between which a mixture of brine
flows. Tank A contains 200 liters of water in which 50 kilograms of salt has been dissolved
and Tank B contains 100 liters of pure water. Water containing 1kg of salt per liter is
pumped into Tank A at the rate of 5 liters per minute. Brine mixture is pumped into
Tank A from Tank B at the rate of 3 liters per minute and brine mixture is pumped from
Tank A into Tank B at the rate of 8 liters per minute. Brine is drained from Tank B at a
rate of 5 liters per minute.
(a) Draw and carefully label a picture of the situation, including both tanks and the flow
of brine between them.
JankA
1ks of
Salt
Slits
Pump
EL
Brine mit
tark A from tank 13
Tank 13
k
3L
zooliters of
Ico liters of
water with
pure water.
Saky salt
→
777
disslore inside
Brine mix is pumped from
tank A to B of 82
Brine drainen
min
by Gf salt (b) Assume all brine mixtures are well-stirred. If we let t be the time in minutes, let x(t)
1ks…
No chatgpt pls
Remix
4. Direction Fields/Phase Portraits. Use the given direction fields to plot solution curves
to each of the given initial value problems.
(a)
x = x+2y
1111
y = -3x+y
with x(0) = 1, y(0) = -1
(b) Consider the initial value problem corresponding to the given phase portrait.
x = y
y' = 3x + 2y
Draw two "straight line solutions"
passing through (0,0)
(c) Make guesses for the equations of the straight line solutions: y = ax.
Chapter 7 Solutions
Fundamentals of Differential Equations (9th Edition)
Ch. 7.2 - Prob. 1ECh. 7.2 - Prob. 2ECh. 7.2 - Prob. 20ECh. 7.2 - Prob. 28ECh. 7.2 - Prob. 29ECh. 7.4 - In Problems 110, determine the inverse Laplace...Ch. 7.4 - Prob. 3ECh. 7.4 - Prob. 5ECh. 7.4 - Prob. 7ECh. 7.4 - Prob. 9E
Ch. 7.4 - Prob. 11ECh. 7.4 - Prob. 13ECh. 7.4 - In Problems 1120, determine the partial fraction...Ch. 7.4 - Prob. 17ECh. 7.4 - Prob. 19ECh. 7.4 - Prob. 21ECh. 7.4 - Prob. 23ECh. 7.4 - Prob. 25ECh. 7.5 - Prob. 1ECh. 7.5 - Prob. 3ECh. 7.5 - Prob. 5ECh. 7.5 - Prob. 7ECh. 7.5 - Prob. 9ECh. 7.5 - Prob. 11ECh. 7.5 - Prob. 13ECh. 7.5 - Prob. 25ECh. 7.5 - Prob. 27ECh. 7.5 - Prob. 33ECh. 7.5 - Prob. 35ECh. 7.6 - In Problems 14, sketch the graph of the given...Ch. 7.6 - Prob. 3ECh. 7.6 - In Problems 510, express the given function using...Ch. 7.6 - Prob. 7ECh. 7.6 - Prob. 11ECh. 7.6 - Prob. 17ECh. 7.6 - Prob. 19ECh. 7.8 - Prob. 1ECh. 7.8 - Prob. 3ECh. 7.8 - Prob. 5ECh. 7.8 - Prob. 23ECh. 7.10 - In Problems 119, use the method of Laplace...Ch. 7.10 - Prob. 3ECh. 7.10 - Prob. 5ECh. 7.10 - Prob. 7ECh. 7.10 - Prob. 9ECh. 7.10 - Prob. 11ECh. 7.10 - Prob. 13ECh. 7.10 - Prob. 15ECh. 7.10 - Prob. 17ECh. 7.10 - Prob. 19E
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Intro to the Laplace Transform & Three Examples; Author: Dr. Trefor Bazett;https://www.youtube.com/watch?v=KqokoYr_h1A;License: Standard YouTube License, CC-BY