Recent content by Raddy13

Awesome, thank you for the reply!

That would be ideal. The mass is a piece of equipment that sits on a shock mount in the bed of a mining vehicle and the vehicle is constantly hitting potholes and ruts and an acceleration measurement found that the worst case acceleration at the mounting location is 20gs. The equation listed...

I'm working on a project where we have a mass (50 kg) sitting on a spring (350 N/mm) and are subjecting it to a sudden impulse (20g) along the spring axis to simulate a shock. We have the profile of the acceleration defined as: ##a(t) = x''(t) = P\cdot \sin^2 (\pi \cdot t / T)## Where P (peak...

So I should have chosen the negative value from the quadratic solutions?

I would expect the sign convention to be be positive = up, negative = down. That's the convention for the elevation term, but it's not the convention for the gravity term, that's why I'm unsure.

I would expect it to be negative.

Homework Statement This was a problem on my fluids final and I'm trying to figure out if my rationale was correct here. The problem was an open air tank filled with water and at the bottom was a pipe pointing straight down. You had to find the exit velocity at the bottom of the pipe and account...

ϒ is specific weight (density times gravity). It would end up with the same result, but since the one of the pi groups has to take the form of Δh/d, so Δh has to be one of the terms.

This is the problem I'm currently working on: The pi groups I identified were h1, h2, d, D, g, t, and velocity, but when I looked at the solution, it selected Δh, D, t, ρ, d, ϒ, h1, with no explanation why those variables are needed. If I was solving with the Bernoulli equation, I wouldn't...

I bought a Nest thermostat a few months ago and I wanted to figure out how much energy it has statistically saved me. I have my usage data going back four years (I track the utilities to split with roommates) and I can find the historical weather data for my area for each day of the month. One...

It's not looking for a specific frequency of sound, it's just looking for any sound above a certain threshold, so I think using your equation would be beyond the scope of the project. I'm already pushing the MCU to its limits speed-wise to get it to respond to the sound intervals, I think adding...

Oh okay, I see now. Is there any to mathematically correct for it knowing only the time interval between the two microphones? For anyone interested, I recreated JBA's drawing to scale in CAD so you can see the angle more clearly:

I just approximated the curvature in my Word diagram, but in an accurate, theoretical, 2-D drawing, aren't the sound waves treated as circles? And the time to reach the microphone is the distance (radius) from the source divided by the speed of sound, right? Or am I misunderstanding that? To...

I included that in my calculations, r = the spacing between microphones

I haven't gotten as far as filtering out multipath interferences, I'm still at the theoretical stage. Here's a rough diagram of the setup: Sound above a certain threshold triggers the locating response from the MCU. The sound hits mic 4 first, telling the processor that the sound is located...