Consider the following boundary value problem (if necessary, see Section 2.4.1):
(a) Give a one-sentence physical interpretation of this problem.
(b) Solve by the method of separation of variables. First show that there are no separated solutions which exponentially grow in time. [Hint: The answer is
What is λn?
(c) Show that the initial condition, u(x, 0) = f(x), is satisfied if
(d) Using Exercise 2.3.6, solve for A0 and An(n ≥ 1).
(e) What happens to the temperature distribution as t → ∞? Show that it approaches the steady-state temperature distribution (see Section 1.4).Reference Exercise 2.3.6:
Evaluate
Use the trigonometric identity
(Be careful if a − b = 0 or a + b = 0.)
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