# Search results

1. ### Engineering Thevenin Equivalent Circuit

Homework Statement Problem located in attachment. Homework Equations Parallel, series and wheatstone bridge equations for resistors The Attempt at a Solution Converted the circuit to look less confusing. Work shown in other attachment. I am simply using the equations relating to simplifying...
2. ### Engineering Circuits dependent sources

Homework Statement Determine Vy in the circuit of the below figure: (In attachment) Homework Equations ohms law resistance adding equations for parallel and series The Attempt at a Solution So I found Vx=(1.2A)(5ohms) = 6v Afterwards I computed the current supplier: (6)(0.1)=0.6...
3. ### First order linear differential equations

Homework Statement dy/dt=y((3t^2)-1), y(1)=-2 Homework Equations Basic integrals The Attempt at a Solution integrate on both sides: dy/y=dt((3t^2)-1) ========>ln(y)=(t^3)-t+c ========>y=e^((t^3)-t+c) ========>y=e^((t^3)-t)e^(c) I am not sure if its some e rule that I forgot...
4. ### [Multivariable Calculus] Flux and Maple Program

Homework Statement It would help if you guys had access to Maple Anyways here is the problem: http://poibella.org/calc3f11/wp-content/uploads/2011/09/lab_3_vector_calc_F_11.pdf It is on question 12 asking for flux and the questions after that. Homework Equations In the link The...
5. ### Wire for a coil gun

I am making a coil gun for my physics project and I am wondering if it is better to use a thick wire or a thin wire for the coiling process. (both are magnetic wire) Also, when I coil it, am I supposed to make only one layer of coil as opposed to several layers? Thanks in advance.
6. ### Complex Eigenvalues

Homework Statement A 3x3 matrix with all 9 of the numbers being .3 Find all the eigenvalues. Homework Equations The Attempt at a Solution I worked through it and I ended up with (l=lamda) l^3-.9l^2+.54l-.162=0 With my calculator I found one of the values, which means that there...
7. ### Finding basis of spaces and dimension

Homework Statement Find a basis for each of the spaces and determine its dimension: The space of all matrices A=[a b, c d] (2x2 matrix) in R^(2x2) such that a+d=0 Homework Equations The Attempt at a Solution So I jumped at this question without knowing too much about spaces and...
8. ### Linear Algebra Help

Homework Statement There are two questions in my problem set that are giving me a hard time: 1. The cross product of two vectors in R^3 is defined by [a1, a2, a3]X[b1, b2, b3]=[a2b3-a3b2, a3b1-a1b3, a1b2-a2b1] (they are all one column) Consider an arbitrary vector v in R^3. Is the...
9. ### System of equations, matrices

Homework Statement Consider a linear system of four equations with three unknowns. We are told that the system has a unique solution. What does the rref of the co efficient matrix look like? Homework Equations The Attempt at a Solution When it says "unique solution" I'm going to...
10. ### Clarification on what is considered reduced row-echelon form

Homework Statement In a 2x2 matrix are these considered RREF? (0 0, 0 0) and (0 1, 0 0)
11. ### Linear Algebra, simplifying large matrices

Homework Statement Find all solutions using Gauss-Jordan elimination: [ 0 0 0 1 2 -1 l 2 1 2 0 0 1 -1 l 0 1 2 2 0 -1 1 l 2] Homework Equations Switching rows, able to scale any row able to add non zero multiple to row The Attempt at a Solution What I did was...
12. ### Resistor Capacitor circuit

http://www.mediafire.com/?dqjlrfbu0m63l67 [Broken] Hey I've been trying to recreate this circuit on a breadboard for a while and it never works... Then I try to make it in a circuit simulator and it still doesn't work. Anyone know if the circuit actually works? Also I believe this circuit can...
13. ### Difficult vector question

Homework Statement Particle A moves along the line y=30m with a constant velocity vector of magnitude 3/ms and it is parallel to the x axis. Right when particle A passes the y-axis Particle B leaves the origin with 0 initial speed and a constant acceleration magnitude of .4m/s/s. What angle...
14. ### Vectors dot product and cross product help

Homework Statement Vectors A and B (both with the lines over it) lie in an xy plane. Vector A has magnitude 8 and angle 130 degrees, Vector B has components Bx=-7.72 and By=-9.2. a)What is 5(vector A) dot vector B? b)What is 4(Vector A) cross 3(vector B) in unit vector notation and magnitude...
15. ### Mechanics/Calculus question phrasing help

Homework Statement Derive the kinematic equations for constant a from change in x=V(avg)Xt & change in v= a(avg)Xt Homework Equations v=v(o)+at (Every other equation that can be made from x=x(1)+V(0)t+.5at^2) x= position a=acceleration (constant) v=velocity t=time The Attempt...
16. ### Gas law problems

heres a partial pressure one: 1. A mixture of gases containing equal weights of carbon dioxide, CO, and ammonia exerts an overall pressure of 450 torr. What pressure is exerted by each gas individually? my last question is: 2. The relative rate of diffusion between two gases is 1.89. If the...