Homework Statement
What are the potential errors in measuring strain with strain gages? How can these
errors be minimized?
The Attempt at a Solution
In my class notes, I have the four Errors.
1-Gage mounting (glue thickness & flex)
Use a thin layer of glue and make sure the layer is...
Wow, thank for the quick reply.
I know that, but don't you times it by 10 V? Isn't the units for resolution volts? I assumed when they said "resolution of 0.01%," I assumed this was .01% of the full scale voltage. Is that wrong to assume?
Should resolution just equal .0001? Then N= 16.6 = 17...
Homework Statement
An A/D converter is to operate with a full-scale voltage of 10V. How many bits should be employed to obtain a resolution of 0.01%?
Homework Equations
Resolution = Full Scale voltage / (2N - 1)
The Attempt at a Solution
.01% * 10 V = .01/100 * 10 V = .001...
Homework Statement
http://img843.imageshack.us/img843/5370/helpxd.jpg [Broken]
Homework Equations
Sin law
The Attempt at a Solution
I got to:
F1/sin(105) = F1u/sin(45) = F1v/sin(30)
I get F1u = - 219 and F1v = 254.5.... It says it is wrong, not sure what I did.
Homework Statement
S P^4 e^-P DP
Homework Equations
My parts.
The Attempt at a Solution
I know you can do u = P^4, and DV = e^-P
Then, you get du = 4P^3 dx and V = -e^-P
-P^4 e^P + S 4P^3 e^-p dx
Now, I can just repeat that for the intergral until I get to were the P...
Homework Statement
by expanding the binomial show that ( (Sqtroot(3)/2) + (1/2)i )^4 = ( (-1/2) + (sqroot(3)/2)i )
The Attempt at a Solution
I'm stuck, I now ( (Sqtroot(3)/2) + (1/2)i )^4 = ( (9/16) + (1/16)i )
But that's all I got, don't know the next steps.
Homework Statement
Using Gaussian Elimination:
3x - 2 y = 5
6x-4y =7
The Attempt at a Solution
[ 3 -2 5]
[6 -4 7]
* top row by 1/3
[1 -2/3 5/3]
* Top row by -6, add to bottom row:
[0 0 -3]
So I get this:
[1 -2/3 5/3]
[0 0 -3]
How can 0y equal -3?
Homework Statement
Convert the equation to a first order system.
d^2y/dt^2 + 3dy/dt + 2y = 0
The Attempt at a Solution
Set d^2y/dt^2 = dv/dt
dy/dt = V
So, I now have: dv/dt + 3v + 2y = 0
Now, i'm not sure what to do with that Y, In my notes we only did examples with...
Homework Statement
Find all Equilibrium points for the following systems.
B. dx/dt = 5x - x^2 - 3xy
dy/dt = 8y - 3xy - 3y^2
The Attempt at a Solution
0 = x(x + 3y - 5)
0 = y(y + x - 8/3)
Equilibrium points: (0,0) but I can't find anymore? is (0,0) the only one?
I think I set y(t) to 0. If this is the case, I get:
0 = -100e^(-1/20t) + 150e^(-1/40t)
How do I get rid of the e's? I'm not sure how with the numbers is front. Without the numbers in front I know I could rise them to ln.
Homework Statement
http://img262.imageshack.us/img262/678/im000724.jpg [Broken]
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The Attempt at a Solution
http://img843.imageshack.us/img843/5651/im000726.jpg [Broken]
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I got all the way to g, but I don't know how to...