This document contains the code for two MATLAB programs. The first program calculates how long it would take to travel 93 million miles at 0.2 miles per minute. It determines it would take 465 million minutes, 775 thousand hours, 27.9 billion seconds, and 885 years. The second program calculates the equivalent resistance of two parallel resistors by taking the inverse of the sum of the inverse of each resistor value. It displays the individual resistor values and calculated equivalent resistance for three cases.

1. 11/8/2015 Lab1
file:///Users/Revolver/School/F15/ME105/Lab1/html/Lab1.html 1/2
clc
%----------------------------------------
% Program: Lab1.m
% Author: Carlos Pereyra
%----------------------------------------
%%Problem 1.4
% Program Purpose:
% Determine how long (in Minutes, Hour, Seconds, and Years)
% it takes to travel 93x10^6 miles going 0.2 mile/min
clc
v=1/5; %(mile/min)
x=93*(10^6); %(mile)
tMin=x/v; %Minutes to the sun
tHour=tMin/60; %Hours to the sun
tSec=tMin*60; %Seconds to the sun
tYear=tHour*(1/24)*(1/365);
fprintf('It takes this long to get to the sunnn')
fprintf('t: %2.0f (Minutes)n',tMin)
fprintf('t: %2.0f (Hour)n',tHour)
fprintf('t: %2.0f (Second)n',tSec)
fprintf('t: %2.0f (Years)n',tYear)
It takes this long to get to the sun
: 465000000 (Minutes)
: 7750000 (Hour)
: 27900000000 (Second)
: 885 (Years)
%%Problem 1.17
% Program Purpose:
% Determine the equivelent resistance of two parellel
% resistors R1, and R2. These values are stored in the
% lists r1, and r2.
clc
r1=[100e3,100e3,100e3];
r2=[100e3,1,10e6];
abc=['a','b','c'];
N=2;
for R=0:N
Rinv=1/(r1(R+1))+1/(r2(R+1));
Ru=1/(Rinv);
rA=r1(R+1);
rB=r2(R+1);
letter=abc(R+1);
fprintf('part %s.)n',letter)

2. 11/8/2015 Lab1
file:///Users/Revolver/School/F15/ME105/Lab1/html/Lab1.html 2/2
fprintf(' R1 t R2 ttReqtUnitsn')
fprintf('======t ========t======t=====n')
fprintf('%5.0ft %6.0f t%5.0ft(ohms) n',rA,rB,Ru)
fprintf('n')
end
part a.)
R1 R2 Req Units
====== ======== ====== =====
100000 100000 50000 (ohms)
part b.)
R1 R2 Req Units
====== ======== ====== =====
100000 1 1 (ohms)
part c.)
R1 R2 Req Units
====== ======== ====== =====
100000 10000000 99010 (ohms)
Published with MATLAB® R2015a