ENGR 126 Exam 3 Fall 2007 Solution - ENGR 126 Name_Solution...

ENGR 126 Name: _________Solution________
Fall 2007 PUID: ________________________
Exam 3 Div:_____________ Team:______
Problem #1 (14 points)
a) MATLAB code for a user-defined function called "Re_num".
function RE = Re_num(d,v,l,mu)
% Re_num computes the Reynolds number
% INPUTS
% d = density (kg/m^3)
% v = fluid velocity (m/s)
% l = length (m)
% mu = fluid viscosity (Nsm^-2)
% OUTPUT
% RE = Reynolds number
RE = d*v*l/mu
b) MATLAB code that would invoke this function from the Command window.
>> ___ r= Re_num(1000,0.8,0.1,0.0009) _________________________________
OR
>> a = 1000
>> b = 0.8
>> c = 0.1
>> d = 0.9e-3
>> r = Re_num(a,b,c,d)
Problem #2 (8 points)
x = 5 y = 2 m = 7 n = 10
Problem #3 (4 points)
my_program run my_program
my_program() run H:\My Documents\MATLAB\my_program
Problem #4 (10 points) Client and audiences:
a) State the client.
Museum director or museum
b) State the client's need(s).
Exhibit to excite middle school children about engineering or STEM
c) List three possible audiences for the deliverable (poster).
museum director
judges
sponsors, museum board, donors, engineers hired by museum
TAs or Professors or Chell Nyquist
Peers/Classmates

ENGR 126 Name: _________Solution________
Fall 2007 PUID: ________________________
Exam 3 Div:_____________ Team:______
Problem #5