Determine the stability criterion for an explicit solution of three-dimensional transient conduction in a rectangular geometry.
GIVEN
- Three-dimensional transient conduction in a rectangular geometry
FIND
(a) The stability criterion for an explicit situation
From the solution of Problem 3.49, the control volume energy balance equation is
so the coefficient on T is
Since this coefficient must be greater than zero to ensure stability, we have
Note that this expression is consistent with the extension from one-dimensional to two-dimensional
stability criteria.
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Determine the potential difference Va ? Vb shown in the circuit below
a.
?5.0 V
b.
+5.0 V
c.
?10 V
d.
+10 V
e.
0 V
If 
what is the power supplied to the circuit by 
?
A. 4.0 W
B. 8.0 W
C. 12 W
D. 16 W
E. 20 W