Homework Statement
-Use Hamiltons Principle
Homework Equations
\int _{t _{1}}^{t _{2}}({\rm }\delta T -\delta U -\delta V _{E }) dt}
The Attempt at a Solution
Here are my energy equations.
So we have kinetic energy from the base and the beam.
T_{{{\it beam}+{\it base}}}=1/2\,\int...
Homework Statement
near-field distance attenuation follows an inverse cube law (1/d^3), while in the far-field it follows inverse law (1/d). Prove mathematically how we arrive at 60dB/decade from the inverse distance cube relation and 20dB/decade from the inverse distance
relation...
{\frac {{\it du}}{{\it dx}}}=998\,u+1998\,v
{\frac {{\it dv}}{{\it dx}}}=-999\,u-1999\,v
u \left( 0 \right) =1
v \left( 0 \right) =0
0<x<10
Second Order Backward Difference formula
{\frac {f_{{k-2}}-4\,f_{{k-1}}+3f_{{k}}}{h}}
I'm trying solve this numerically in matlab, but can't seem to...
Just wondering how the educators out there or departments choose their teaching asisstants. In my department, if faculty is teaching the course, then they tend to use their own students from their lab. If it's an outside professor, then the faculty professor in charge will probably ask HR to...
Thanks to budget cuts the class sizes have increased a lot, which makes the class roster on my excel sheet pretty long. After a couple of hours of looking through students different styles of hand writing, my eyes get a little fuzzy and it makes searching for students names on the spreadsheet...
Me and another person were rummaging through one of my colleges labs looking for usable parts for my groups product design course. We found this medium size motor that weighed about 2-3 pounds. The problem is that there were no stickers at all that indicated its specifications. There were a few...
My lab just bought the GSL1300-40X Desktop Alumina Tube Furnace from MTI recently. This thing has been a total headache to install and operate. The lab manager was totally confused about the wiring. The instructions were obviously written by someone who did not speak English well. Then there was...
Can someone read over my resume. Thank You
Here is the file. I uploaded it this site, because I don't know when an Admin will ok the file.
http://www.badongo.com/file/7507007
I replaced a lot of the names with generic stuff since this is a public form.
Couple of things that I was unsure...
At this moment I am typing up my resume for an engineering career fair coming up this week. I lost my resume doc from last year, so I have to type it up from scratch and memory. The old one was pretty standard like objective, education, experience etc. I did some volunteer undergrad research...
I've noticed a weird thing that Matlab does whenever I save my m-file then try to run it. If I save my M-file with a simple file name like "HW4" or "untitlited" it will run. However if i save my m-file as file name HW#4_3.40 (I just wanted to label the file with the problem # from the text I'm...
During last 2 weeks I've been running around asking (mostly e-mailing cause they are rarely in their offices) professors in the fields of solid and structural mechanics for research positions. I got a late start cause I didn't know when to start looking for positions. Turns out at my college 6th...
Homework Statement
Consider the following input-output relationship:
y(t) = \int_0^\infty e^{-\sigma}x(t-\sigma) d\sigma
A) Is the system time-invariant?
B) Find the output y(t) when the input to the system is x(t) = \mid t \mid , -\infty < t < \infty
Homework Equations
These are the...
Homework Statement
http://img136.imageshack.us/img136/1930/carrs8.th.png [Broken]
Homework Equations
a = (v^2/p) en + (v*)et
a- accel
v-velocity
en- inward normal
et- unit vector along tangent
v*- tangential acceleration
p- curvature
The Attempt at a Solution
FOr the first part I just need...
Homework Statement
http://img402.imageshack.us/img402/5733/problemvm7.th.jpg [Broken]
I had to draw in that line. It was suppose to show a dotted line of the projectile, but the page did not scan well.
Homework Equations
The Attempt at a Solution
First atempt...
Someone recommend a Fluid Mechanics text for an introductory course.
And to understand the position I am in at the moment bad professor, TA and text ( Fluid Mechanics by Frank M. White)
My library has a few old fluids text, and the ones I flipped through were Fundamentals of Fluids by...
A spherical helium balloon is 2.5 m in diameter and has a total mass of 6.7 kg.
When released into the U. S. Standard Atmosphere, at what altitude will it settle?
My first thought was that diagram has the weight of the balloon acting downward, buoyant force upwards.
-weight + Fb = 0...
Not really a hw problem, but I'm having a hard time with this section. It's mostly dealing with the horizontal component of the force.
This is from my book, Fluid Mechanics by frank m white 5 th ed,
"The horizontal component of force on a curved surafce equals the force on the plane area...
I'm trying to solve this problem with different approaches. Link is here
http://img138.imageshack.us/img138/2268/problem1eb1.th.png [Broken]
the answer is 0i + 0.0927j + 0.0232 k lb
* Means DOT
Method one: Find the force in scalar components. Then Take the cross product of two position...
The problem and solutions is here
http://img206.imageshack.us/img206/6093/problem1rm4.th.png [Broken]
Isn't the shear stress for both the inner and outer negative? When i take the derivative i get negative. The derivative is basically ln ( 1/x) since the rest are just constants.
Edit: I meant...
I got accepted to both schools as a transfer student form a community college. i'm having trouble deciding where to go, because both colleges have very good engineering programs. I think about it every freaking day, but mostly cause people keep asking if i have decided yet. :uhh:
Most of the...
Posted in different section decided to move this post here
I'm currently using Statics: Analysis and design of systems in equilibrium by Sherri D sheppard.
My classmates and I want another statics book for reference. We are looking into
Vector Mechanics for Engineers, Statics and...
I'm currently using Statics: Analysis and design of systems in equilibrium by Sherri D sheppard.
My classmates and I want another statics book for reference. We are looking into
Vector Mechanics for Engineers, Statics and Dynamics 7e
Ferdinand P. Beer (Author), Jr., E. Russell...
I need some help in this problem to see if my game plan is right. My answer doesn't make sense, well to me it doesn't.
A weight of 200 lb hangs from a frame of negligible weight, as shown. If the frame is in equilibrium, determine the loads acting on the frame at A and D. Use the fact that...
I was copying my friends notes and had a hard time understanding one of the examples he had written down from lecture. See the attachment for a the picture of the example. This example looks like a projection of two vectors to me, but i'm not sure.
u'=\frac{4i+2j}{\sqrt{20}} u' = unit...
Spring Problem
I need some help or hints on this exercise
When a certain linear spring has a lenth of 180mm, the tension in it is 170N. FOr a length of 160mm, the compressive force in the spring is 130N.
a. What is the stiffness of the spring in SI units? In U.S. Customary units?
b. What...
i was taking my final today and came across an initial value problem. Seemed pretty simple, seperate the variables, integrate, then use the initial value to find the value for the constantt C. The weird thing was that the constant C would be multipled by 0 when i plug in the given initial...
I'm having troube getting my program to display a parallelogram. The source code here just displays a triangle with "6" as the speicifed size.
*
**
***
****
*****
******
*****
****
***
**
*
The output is suppose to be something like this:
_____*
_____**
_____***
_____****...
The inductance of the solenoid determines the time it takes to establish this current. Find the inductance,the resistance, and the time constant of a solenoid that is constructed by wrapping five “tightly wound” (i.e., wire-against-wire like this ) layers of 0.30 mm diameter copper wire on a...