Tuesday, September 1, 2015

First day on Engr7

First day on Engr7:
We did an experiment here we had one person act like a robot and the other direct their movement. We then posted what we found important of our experience.
Here is a picture on our thoughts of it.

We later found the experimental equations to find the forces and velocity needed to safely land an egg from the roof.

Here is the video, we did not succeed.

Conclusion: Our first day was fun and was nice to do the physics before trying our strategy in keeping the egg safe from falling. We found out that our interpretation of our physical world did not match the real world so our strategy did not take into account factors like wind, spin and other real world properties.

HMWK1: Math lab code.
r1 = 10
r1 =
    10
r2 = .5
r2 =
    0.5000
 v1 = pi*(4/3)*r1^2
v1 =
 418.8790
v2 = pi*(4/3)*r1^2
v2 =
  418.8790
v3 = pi*r2^2*15
v3 =
   11.7810
vtot = v1+v2+v3
vtot =
849.5390
SA1 = 4*pi*r1^2SA1 =
   1.2566e+03
SA2 = 4*pi*r1^2
SA2 =
   1.2566e+03
SA3 = 2*pi*r2^2+2*pi*r2*15
SA3 =
   48.6947
SAtot = SA1+SA2+SA3
SAtot =
   2.5620e+03
P = 220,n = 2, V = 1,a = 5.536, b = 0.03049, R = 0.08314472
P =
   220
n =
     2
V =
     1
a =
    5.5360
b =
    0.0305
R =
    0.0831
T = P*V/(n*R)
T =
   1.3230e+03
T2 = (P+(n^2*a)/V^2)*(V-(a*b))/(n*R)
T2 =
   1.2104e+03
Res = 800,L = 100*10^-3,C=1*10^-6
Res =
   800
L =
    0.1000
C =
   1.0000e-06
Splus = -(Res/(2*L))+sqrt((Res/(2*L))^2-(1/(L*C)))
Splus =
  -1.5505e+03
Splus = -(Res/(2*L))+sqrt((Res/(2*L))^2-(1/(L*C)))
Splus =
  -1.5505e+03
Sneg = -(Res/(2*L))-sqrt((Res/(2*L))^2-(1/(L*C)))
Sneg =
  -6.4495e+03
Res = [100:1000];
K1 = (Res/(2*L))
Res = [100:100:1000];
K1 = (Res./(2*L))
Splus = -(K1)+sqrt((K1).^2-(1/(L*C)));
Sneg = -(K1)-sqrt((K1).^2-(1/(L*C)));
table = [Splus', Sneg']
G = 6.673*10^-11,me=6*10^24,mm=7.4*10^22,ravg=3.9*10^8;
G =
   6.6730e-11
me =
   6.0000e+24
mm =
   7.4000e+22
F = G*me*mm/ravg
F =
   7.5970e+28
ravg = linspace(3.8*10^8,4.0*10^8,10)
ravg =
   1.0e+08 *
  Columns 1 through 5
    3.8000    3.8222    3.8444    3.8667    3.8889
  Columns 6 through 10
    3.9111    3.9333    3.9556    3.9778    4.0000
F = G*me*mm/ravg
Error using  /
Matrix dimensions must agree.
F = G*me*mm./ravg
F =
   1.0e+28 *
  Columns 1 through 5
    7.7969    7.7515    7.7067    7.6624    7.6187
  Columns 6 through 10
    7.5754    7.5326    7.4903    7.4484    7.4070
>> d = 12000;pg=3.5,CO=19.4;
pg =
    3.5000
fortwo= d/37*(pg)
fortwo =
   1.1351e+03
fortwo*CO=
fortwo*CO=
Error: The expression to the left of the equals sign
is not a valid target for an assignment.
cost1 = fortwo*CO
cost1 =
   2.2022e+04
cars= [37,29,43,31,48,32,42];
CO2=12000./cars
CO2 =
  Columns 1 through 5
  324.3243  413.7931  279.0698  387.0968  250.0000
  Columns 6 through 7
  375.0000  285.7143
CO2=12000./cars*19.4
CO2 =
   1.0e+03 *
  Columns 1 through 5
    6.2919    8.0276    5.4140    7.5097    4.8500
  Columns 6 through 7
    7.2750    5.5429
cost = 12000./cars*3.9
cost =
   1.0e+03 *
  Columns 1 through 5
    1.2649    1.6138    1.0884    1.5097    0.9750
  Columns 6 through 7
    1.4625    1.1143
***done***

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