Practice problems for Midterm 2
1. Suppose that A is a 100 100 matrix with all elements equal to zero except for the diagonal elements, aii = 3. (a) Calculate |A|. |A| = 3100 , because B is a diagonal matrix. (b) Suppose that the matrix B is the same a A,

ECE 4000 - Project Engineering and Professional Practice
November 12, 2003
EXAM #2 Solution
Page 1 of 7
Problem 1.
(a) There is typically higher tolerance for risk if:
Voluntary
Familiar
Uncertain
In the future
One is in control
Tolerance depends on who i

ECE 4000 - Project Engineering and Professional Practice
October 4, 2006
EXAM #1 Solution
Page 1 of 4
Problem 1. (20 points)
For each motor, the present value of the operating cost =
Purchase Price (not considered here) + Present value of (Maintenance +El

Math 421 Midterm #1 Solutions
1. Function f (t) is defined as follows: f (t) = t + 1, -t e ,
0,
t < 1, 1 t 2, t > 2.
(a) Sketch the function f (t).
(b) Express f (t) in terms of the Heaviside functions. f (t) = [H(t - 1) - H(t - 2)](t + 1) + H(t - 2)e-t

Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by CamScanner
Scanned by Ca

EOE-255, Final Sp 210 page 2
1. What is V0 in the circuit shown below, for the diode assume Von%0.7V and RD=500£2
(2) -5V
(3)0V (4)4.3V
(5) Open circuit (6) None of these
\o _ o? '
ID a; :- O—gg é MA
My?
V0 1. Oh ggGQMH? : 3.86 V ESE—255, Final Sp 210

ChE 430
Final
Thursday, May 16, 2002
Part I.
Problem 1. Packed-Bed Reactors. 25 pts.
A second order catalytic reaction
A B
is carried out in an isothermal packed-bed reactor containing spherical catalyst pellets. The exit
conversion is 85%. The reactant a