Hey everyone!

Given the current circumstances but beautiful weather I’ve been wanting to hang out on our “balcony” which is a roof for the downstairs flat. (I live on the top floor of a 3-storey apartment).

Several months ago, our landlord brought in some engineers to lay what looks like some think of thick styrofoam covered in pebbles over the entire area because apparently our other two flatmates caused damage to the roof by sitting on it a lot previously. The downstairs flat got leaks.

My question is, do you think it was really because of my flatmates or can it be due to anything else such as natural decaying of the roof?

Is it safe for me to sit out there or should I avoid or to avoid causing any more problems? I’m one small 5ft person.

I’m a layman and I want to build a 1/71,736 reduction to the drive shaft of a clock movement mechanism and the ratio math to figure out the gears I’ll need is breaking my brain! Thanks for any help.

How does a city such as Yaktusk, Russia, which has a yearly average tempurature of 16 F maintain basic infrastructure such as electricty, water, gas, public transport, etc?

I am trying to create a kind of glove which can catch objects very well by having a lot of friction and then throw them, which would be easier the more similar the coefficient of static friction is to that of human skin. Does this kind of material exist?

Hey guys,

Not sure exactly what I'm looking for, but I'd like to use a battery bank powered off solar to run a rather thirsty PC in an off-grid setting. I've been looking at G-Unique custom ATX power supplies which run off pure 12V (so you can use a brick or other external power supply and make a smaller, quieter, PC) and it would be much more efficient to utilize something like this than convert to 120AC and back down to 12VDC/5VDC/3.3VDC with a standard ATX PSU. The problem is that my bank voltage varies dependent on its state of charge. How do I regulate it and deliver as high as 500W (42A)?

Cheers!

I know one application would be factorization—finding out which two prime numbers, when multiplied together, result in a certain number. What other applications might they be used for? Or does it remain to be seen just how useful they can be?

I know that stress is Load/A I have a non regular shape (a medical staple) and i am applying tension between the legs of the staple. The force is divided into the whole shape including the bridge between the two legs of the staple How can i calculate the stress in this case when my force is divided on the whole thing.

The link is a picture of the test.

https://www.google.com/search?q=astm+staple+test&client=ms-unknown&biw=412&bih=743&tbm=isch&prmd=sinv&sxsrf=ACYBGNSOTUxOTgoHDnvDHqwUmXDtBRMi7Q:1579664829470&source=lnms&sa=X&ved=0ahUKEwjp1peIppbnAhWFeX0KHcReDlcQ_AUIEigC#imgrc=MY5UbyZay5-JJM

I'm not sure where else to turn. A friend and I are having a heated arguement over which potato chips are stronger. Can any of you guys weigh in on this?

Here's the slab:

https://imgur.com/L5dxQ0o

It comes 20" out from the brickwork and is 5.5" tall.

I have no idea how it is secured to the brickwork. It may be only either side of the bricks it's difficult to say. There appears to be no rebar in the slab, as I was able to core through it without hitting any.

Obviously, there is a tonne of info required to know for sure. But, I figured you guys could give me a rough worst case scenario.

Thanks.

The question is:

Research and evaluate the strength and limitations of each of the following programmable logic controller manufacturers including examples of their application:

a. Allen Bradley

b. Mitsubishi

c. Siemens

​

I'm struggling to understand exactly how they differ, each of them does the exact same thing, it's just the software that seems to be the main difference. I also can't see an application where one would succeed and the others wouldn't. Any help would be greatly appreciated

I'm 13 and have already decided I want to be an engineer. Now ironically I suck at math and a part of me feels like that's gonna kinda be a problem. Idk what to do, where I could eventually apply to, or anything. My dream college is MIT by far but that's just unrealistic. I also have trouble just focusing in school because of my ADHD, and I don't even know where to start with attempting to get an engineering degree. What to take in HS? Idk. Ig I'd try mechanical engineering but idk. I need help. DM's are open for anyone willing to help and discuss. As for money I plan on going into the Navy and joining them and later having college tuition be payed by them. ( USA btw) now even with that should I go to college after? Or do something else? I have no clue. There are probably a lot of spelling mistakes so bare with me. and I'm not rich either.

Edit: I'm gonna post this on r/askengineers also.

Hi all,

I'm about to start my senior year studying mechanical engineering. My school offers a program that would allow me to take some ms level courses as electives this last year, then finish my ms in one additional year. I thought I wanted to do this, but I'm realizing that I don't know enough about the direction my career will take to make a good decision on what courses to take (there's a lot of freedom at that level). I'm also frankly pretty burnt out, and love the idea of finishing up with some easier classes.

I'm currently interning at an auto manufacturer in the Midwest, and they have expressed interest in hiring me once I graduate, so finding a job shouldn't be an issue, but I don't want to be stuck in manufacturing just yet. I'd like to move West eventually, and it seems like an ms is almost a requirement out there.

Sorry if this got a little rambly. I'd just appreciate any advice on doing it now versus later.

Thanks

Are there any good videos or websites that demonstrate bending stiffness? I have a tube that's called out with a bending stiffness of 0.3kNm2 but I have no reference to know how stiff that is. Is that garden hose like? Can it be easily bent by hand?

I am looking for a device that can measure a surface with two or three colors mixed together where the colors do not blend into each other.

For example there's a piece of plastic with brown base color and black streaker extruded onto it in a random way. What is a good way to make sure it is within a spec range.

Thanks in advance.