Recent content by Eastonc2

I'm not 100% sure where this belongs, but, I have a script that will allow me to modify the mesh size of an individual part in abaqus, and then execute a job on that part. my question is How do I go about changing the mesh size for multiple parts? *edit* removed first part of question, wasn't...

Homework Statement I have a problem with vectors x and y, where x=[-3,0,0,2,5,8] and y=[-5,-2,0,3,4,10] The problem asks me to determine z=y<~x I've searched my book and cannot determine what this operator is telling me to do. Am I supposed to determine the values of y that are not less...

so, I guess what I'm looking for is, can the dead battery still pass current through the right loop given that the battery on the left is charging it?

What I'm trying to find is a break down of the work required. I know how to do the calculations, I am just unsure of how the numbers would work out because of this second battery. I might be approaching this thinking it's more complicated than it actually is, but I see that second battery, the...

Ok, so, how do I take the second, 'dead', battery into account? I am actually working on a slightly different problem in terms of voltage and resistance, but the arrangement is essentially identical. Do I calculate the current that it would pass through the resistors as well? it's just that...

Homework Statement so the problem, along with the figure, can be found http://www.cramster.com/answers-nov-09/physics/problem-3268-12-car-battery-dies-somuch-volt_697332.aspx?rec=0 Homework Equations I=V/R, The Attempt at a Solution I am able to calculate parts a and b...

ok, so it must be getting a little too late for my brain. e^lnx is...x so this was a major waste of time/space

Homework Statement find the general solution of the given DE dy/dx+(1/x)y=1/x^2 Homework Equations integrating factor (e^(∫P(x)dx)=e^(lnx) The Attempt at a Solution so i put my integrating factor into the equation, and get: e^(lnx)(dy/dx)+(e^(lnx)/x)y=e^(lnx)/x^2 and can't...

ah, my fault, M(x,y)=2x+y i was looking at the equation above it for that first part. the second part is correct though.

Homework Statement determine whether the DE, (2x+y)dx-(x+6y)dy=0, is exactHomework Equations i understand how to determine if they are exact, I just don't understand this specific instance. for my case, M(x,y)=2x+y, but would N(x,y)=(x+6y), or (-x-6y)?The Attempt at a Solution using my first...

changed a few things around, still using integration by parts, actually integrated by parts i think three times total, if I'm remembering last night correctly, to finally end up with the right answer. thanks

ok, so I figured out that last one, now I'm having difficulty with £{t^(2)e^(-2t)}. putting it into the laplace definition I come up with ∫t^(2)e^(-t(s+2))dt. I've tried integration by parts, and come up with: u=t^2, du=2t dt, dv=e^(-t(s+2))dt and that's where...

Homework Statement f(t)=e^(t+7)Homework Equations £{f(t)}=∫e^(-st)f(t)dtThe Attempt at a Solution so i insert my f(t) into the formula, came up with ∫e^(-st+t+7)dt using u substitution, u=t(-s+1)+7, du=(-s+1)dt so it follows that 1/(-s+1)∫e^(u)du=e^(u)/(-s+1) so I plug u back in, and should be...

Homework Statement basically, my question is this, in relation to this diagram, https://www.physicsforums.com/attachment.php?attachmentid=12482&d=1202140386 wouldn't the electric field between the solid sphere and the hollow sphere be a uniform field? Homework Equations The...

The problem: dx(1-y^2)^1/2=dy(1-x^2)^1/2 y(0)=3^(1/2)/2 My attempt: I separated the variables and integrated, and came up with sin^-1(x)+c=sin^-1(y) This is where i am stuck. any suggestions? did I run astray anywhere?