Recent content by JJBladester

I was recently asked to help with some A/V stuff at my church. The goal was simple: Display HDMI video from a laptop to two LCD TVs. Since distance was an issue, I purchased an active HDMI-to-Ethernet converter. I've included a diagram for reference. When I went to plug the 3' HDMI cable...

Hello Zondrina, Assuming clockwise moments, y-axis up and x-axis to the right... From the original diagram, \Sigma M_B=-(800N)(1m)-(500N\cdot m)+(900N)(5.5m)-(E_y)(7m)=0 E_y=\frac{-(800N)(1m)-(500N\cdot m)+(900N)(5.5m)}{(7m)}=521N No need to calculate the sum of the forces in the x...

Homework Statement In the structure shown, the beam is pinned at point B. Point E is a roller support. The beam is loaded with a distributed load from point A to point B of 400 N/m, a 500 N·m couple at point C, and a vertical 900 N force at point D. If the distributed load and the...

This is why I love physicsforums. You answered me and helped me understand the problem within 20 minutes of my post. You're right, I was multiplying the functions when I should not have been. Normally when working with matrices containing only constants, you *do* just multiply elements...

Homework Statement Determine the curl of the vector function below. \boldsymbol{F}\left ( x,y,z \right )=3x^2\boldsymbol{i}+7e^xy\boldsymbol{j} Homework Equations curl\mathbf{F}=\mathbf{\nabla}\times \mathbf{F} =\begin{vmatrix} \mathbf{i}& \mathbf{j}& \mathbf{k}\\...

Thanks Ray. According to my study materials and various study websites, the FE allows slightly less than three minutes per question so I will focus my efforts on time-saving advice like what you mentioned. I couldn't have done this in any less than 10 minutes without a shortcut (using the...

cpscdave: Thank you! It makes sense now. phinds: It did jump out at me that my answer was not correct. That's why I posted for help on physicsforums. Intuitively, if the marksman can hit 3/4 of his shots, he should have way more than a 0.75 probability of hitting at least one out of three...

Homework Statement I'm studying for the FE exam and it's been a while since I've done some of the more basic math. One of the practice problems for the math section states: "A marksman can hit a bull's-eye from 100 m with three out of every four shots. What is the probability that he...

Homework Statement Hello, I need to create a digital counter that follows this sequence: 00, 10, 01, 11, 01, 00, 11, 10 A , C, B, D, B, A, D, C Homework Equations N/A The Attempt at a Solution There are four states (A = 00, B = 01, C = 10, D = 11) so I believe I need two...

I am working on a circuit that inputs a 31-bit pseudo-random binary string into a CCIT CRC-16 block which generates a 16-bit CRC output. I know that M(x)/G(x) = Q(x) + R(x) and the transmitted code will be R(x) appended to M(x). When I simulated the circuit, I got a CRC of 1 0 1 0 1 0 0 1...

Nascent, I feel like a stooge after posting that original post in frustration. I sucked it up and did a mesh analysis on the circuit and found the exact solution that explains what I found on the oscilloscope during last week's lab... to within 1% error. I've been taking dumbed-down...

Homework Statement I'm trying to understand how Twin-T notch filters work. I get that they are made of two passive RC filters, one low-pass and one high-pass in parallel. The trouble I'm having is how to determine the corner frequencies (where Vout = 0.707Vin). The gain of the corner...

Why is the geometric mean used to define the center frequency of a bandpass filter instead of the arithmetic mean? I read in this book that 1. All the lowpass elements yield LC pairs that resonate at ω = 1. 2. Any point of the lowpass response is transformed into a pair of points of the...

That's what I get for working 15 hours of overtime this weekend and trying to get homework done. Vout = 1.005 V as expected... Amazing what sleep will do for you. Thanks for pointing out the math error!

I believe it represents a common-mode voltage (a noise signal or some other common signal on both inputs).