Recent content by PenTrik

Homework Statement Homework Equations M = F * D The Attempt at a Solution For a, I need to find the reaction force on the right side. So what I first did was make the sum of the moment on the left equals zero. 0 = M_0 + r_y * L. r_y = \frac{-M_0}{L} I think this is right...

I just need someone to make sure what I'm doing is correct. I've included all associated equations and attempt of solution in the PDF.

Thanks for the help. Yeah, it makes sense now. I was also making the mistake of assuming that the voltage drop across a current source was zero.

Homework Statement V1 = 15 V V2 = 4 V I = 2 A R1 = 3 Ohm R2 = 4 Ohm R3 = 8 Ohm R = 2 Ohm In this part of the question, I have to solve for the voltage across a and b R isn't listed as a resistor in this circuit because that comes in a later part of the question (which I can do). Homework...

Homework Statement A sinusoidally-varying voltage V(t) = Vosinωt with amplitude Vo = 10 V and frequency of f = ω/(2π) = 100 Hz is impressed across the plates of a circular-shaped parallel plate air-gap capacitor of radius a = 1.0 cm and plate separation d= 0.01 mm. The amplitude of Maxwell's...

Holy ****, I get this now. Thank you much.

Ah uh, would my limit for dx be from 0 to b, and for dy to go from 0 to y=h(x/b)^2?

Homework Statement Prove that the moment of inertia of the same region about the x-axis, Ixx, is given by bh^3/21 where y = h(x/b)^2Homework Equations \int(y^2*dA)The Attempt at a Solution so I first figure that dA has to equal h(x/b)^2 * dx and that y has to equal h^2 * (x/b)^4 so when...

Oh, now I understand. Much thanks, you cleared a lot of this up.

So for the first part, this would mean that my solution is basically whatever combination I can get out of the equations I have. So if I make a = 1 and d = 1, then my matrix becomes [[1,-2,1] [1,-2,1]] So is this a possible solution to the nullspace? as for part two: this means that...

Homework Statement If V is the subspace spanned by (1,1,1) and (2,1,0), find a matrix A that has V as its row space. Find a matrix B that has V as its nullspaceHomework Equations Ax = 0 for a nullspaceThe Attempt at a Solution So straight off the bat, I think I can solve the first part. Should...

Ah, your help was much appreciated.

I'm not sure if this is what I'm supposed to do but Given that I have the RREF form, that gives me x1 + x3 + x4 = 0 x2 - x3 - x4 = 0 Given that x1 and x2 are pivots, this gives me x1 = -x3 - x4 x2 = x3 + x4 So, if I substitute x3 and x4 with a and b, this makes my basis the span of...

Homework Statement Find a basis for each of these subspaces of R4 All vectors that are perpendicular to (1,1,0,0) and (1,0,1,1) 2. The attempt at a solution I'm not sure how to approach this question. The only thing I can think of is that a vector that would be perpendicular to both would be...