Home Definition and 525 Threads

I've read about why it would be nearly impossible for an individual to construct a working home built nuclear reactor (of any variety), but I've never understood why a home built nuclear battery couldn't be constructed (think Henry Moseley's work). The size and power output would be impractical...

Homework Statement A projectile launched straight up at 10 m/s will be in the air for: A) 1 s B) 1.4 s C) 2 s D) 5 s Homework Equations Not sure. The Attempt at a Solution I'm honestly not sure what to make of this problem. Since it's freefall, it sounds like we could...

Homework Statement For safety climbing, a mountaineer uses a nylon rope that is 41m long and 0,4 cm in diameter. When supporting a 97kg climber, the rope elongates 1,8m. Find its Young’s modulus. The acceleration of gravity is 9,8 m/s2 a) 82,46 x 108 Pa b) 17,18 x 108 Pa c) 25 x 106...

Long story short, I'm wondering if there are any at home (extremely) part time ME jobs/ internships out there. If you're interested in more background: I just graduated with a mechanical engineering degree in May with a 3.73 GPA. I am currently in veterinary school and was looking for some...

What Makes A Place "Home" For You? I just got back from a very short road trip - two days in San Francisco, two days in Mendocino County. Very nice visit, for sure! San Francisco is an intense city, and Mendocino County is a place where most roads are not much more than donkey trails...

Though standard gravity is 9.80665 m/s2, it must vary from city to city, since the Earth is neither a perfect sphere nor of uniform composition. I'm looking for an experiment to accurately determine the value of g at my current location. The method needs to be precise enough to yield different...

I am at a point where I have to decide what I want to do at this point in my life. I am currently finishing a Masters program and I am doing quite well with my research and school. I see myself going to Academia or industry here in US. As much as I like this country and however hard I...

Hi, I have no problem to study at the library, but there is no way I could study at home. Does anybody have any ideas besides the obvious ones? Sincerely yours, igorronaldo

I have checked How Stuff Work, About.com, Ask.com, Google and even asked an electrical engineer and found no satisfying answer to the following questions: For household AC current, why do we need 2 live, a neutral and a ground 4-wire connection? We get 3 wires from the street transformer where...

http://www.cnn.com/2013/09/27/tech/innovation/death-stereo-system/index.html?hpt=hp_t3 I've had one of these since I was in college 40 years ago. Now it's a watered-down "home theater" system that handles both video and audio. It's still only two-channel audio, not surround sound, with decent...

Homework Statement According to the Guinness Book of World Records, the longest home run ever measured was hit by Roy “Dizzy” Carlyle in a minor league game. The ball traveled 188 m (618 ft ) before landing on the ground outside the ballpark. Assuming the ball's initial velocity was 52 ∘...

Hi! I have a few devices in my home like a desktop, a laptop, a printer, a tablet(Nexus 7) and a smartphone. I usually need transfer files between the device so i use data cables, usb drives or memory cards. But I have a broadband router in my home which I think can be used to set up a wireless...

Hey, weird post but I am interested in science and building things and I wanted to ask any good ways to learn and have fun at home with science (preferably physics) and also some ideas of stuff I can use physics knowledge to build. THANKS!

Hello, I'm going to be starting university this September and I'm having troubles deciding whether or not I should stay at home, or move into university halls. The distance from my house to the university is 40 minutes, 5 minute walk to train station and 35 minute train. I originally...

Hello everyone, I want to create a plasma chamber, and so far, I have a vacuum bell. I have a couple of questions... excuse if I have the terminology wrong. I would like to create a plasma, and then apply a DC magnetic field, so the electron cloud "separates" somewhat from the gas. I have...

Anyone have any good resources/how-tos on building miniature (or not so mini) stirling engines? They seem pretty simple to make, and the coke can ones are pretty cool.

Hello, I just finished my lower division chemistry/physics sequence, and next semester I am transferring and will start taking my upper division chemical engineering classes. I was wondering what sort of projects I can do at home with my knowledge, or if someone can share ideas for DIY type...

I'm writing a novel which has as a protagonist a super-powered being, like in the comics (only he is the sole such critter in the universe). Like Superman he has the ability for flight through space, but he cannot take any matter, baryons, with him. I'm hoping some astronomy experts could help...

Hello all! If you're reading this thread then thank you for taking the time to read and/or reply! I appreciate it!:biggrin::biggrin::biggrin: Onto the guts of the thread. Here I will list what I am trying to do, the associated questions that I have found reasonable to ask, and then any...

I wound 4 layers on a piece of 3/4 conduit. The wire is 20 gauge (.032) and the coil length is 7 inches. I put 5 amperes into the coil and a bolt that fits the conduit didn't move. It stuck to one side of the conduit but it didn't snap in as I expected. What do I do to make this solenoid work?

I wonder if there is a ranking of oscilloscopes by an independent organization, which compares them for different uses? Well, I am a newbie looking for one at a lower cost for home and office inspection. It would be nice if it were simple to use! Apparently the G/S or Stetzer meter can just...

I have had a brain injury - resultant included a very/real bad memory. So can anyone advise me how I might be able to get a free (am an invalid and NOT allowed to work), download of a way to compile & run programs in the Fortran 90 language on a Windows 7 platform. THANKS

Hi all, I live in Perth, Australia and have just moved houses to a place with a relatively small pool, unfortunately it is shaded for the majority of the day by a big tree and it is quite cold and unwelcoming (unless you have built of a sweat). I want to make a solar pool heating system to...

Hi guys, I'm a mechanical engineering student and my dad want's a simplified motorized rotating table. I want to take it as a chance to implement my study in it, and I'm doing it all the way modeled on solidworks and animated. The calculation part is holding me back, there's a couple of things...

Hi, I am an Australian High School student who enjoys studying mathematical and scientific phenomena. It is a mandatory requirement of all students my age that next year we complete a Personal Research Project. The project is designed in a way that allows students to pick their desired area of...

I was just wondering which people generally prefer to do and which is usually more productive if one has both options. I'm guessing that research at one's home institution is more productive because you can work on the project for a longer period of time, but REUs seem to be good for networking...

Electrical Question -- Grid Tie Power Inverters for Home Use Since we are being careful let us assume we have a doll house that is powered by only a 12v source. Inside the doll house, Julie, the doll living there, gets it in her head to construct a 1.2v solar system on the roof of her doll...

I'm a mold inspector looking for an answer to gases from mold growing in wall cavities of a house. The issue is whether gases penetrate into room air (which I can test for) and what the best approach (short of gutting the house) is to reduce exposure to mold gases in the house. The two...

So periodically (every few months, for a few days or a week) I will hear an annoying humming noise at home. It is worst at night, probably because the air is still outside and noise transmits better - and there is less ambient noise. It sometimes rises and falls, sometimes seems to pulse, but...

Just got back home from the Kona side of Hawai'i. Wow. What a freakishly cool place that is! Day one, snorkeling. Saw so many fish...blue, yellow, stripes, red, dots, skinny, long, buck-toothed, bug-eyed, orange, green,...wow. Just, wow. Day two, long hike along beach. Admired the flowers...

I'm quite interested in home-made devices, last year I tried making a sinusoidal wave oscillator at home and succeeded. It feels good to DIY some coarse devices, and recently I'm learning to build a Cathode Ray Tube. However, it's not going successful with me; I would like to build an electron...

There is supposed to be 120VAC between hot and neutral as well as between hot and ground. Why is there no voltage between neutral and ground though? Why does current only flow from hot to neutral and not neutral to hot? Is neutral grounded?

I am planning on calculating the heat loss and heat gain of a terraced house. The data I have collected so far are the footprints of the house, with the size of windows and walls, roof and floors and the materials of which these are made. I know the rear of the house faces S-SE and its...

Are there telecommuting opportunities with a computer engineering degree or an electrical engineering degree?? What kind? Or should I look for a different major? My main wish is to work from home.

Hello again! I have to finish a home test for tomorrow (4pm). I am struggling basically with #2, #5 and #6. Why? because my professor is really old. just so you get an idea, she was the FIRST lady to graduate from EE from University Of Puerto Rico Mayaguez (no bull). She barely can walk or...

Homework Statement i.2(lgx)^2 - lgx = 0 and ii. lg(2x-2)^2= 4lg(1-x) and iii. lgx-6 / lgx-4 = lgx. I simply do not manage to solve these equations, and I would therefore be happy for all help. Thanks in advance.

Homework Statement The test has two parts. In Part A, you predict the results and give qualitative reasoning and in Part B, you actually calculate the values and verify if your predictions and the calculations are in agreement, and then give correct physics reasoning. Consider three events...

Can anyone suggest a guide or books for making a telescope, DIY style. Also what size would be appropriate for a first attempt, and how much might it cost it you have any ideas. Thanks!

Hello all, I'm considering Calculus 4th edition from M. Spivak for my Senior year Calculus book along with George Simmons Calculus with Analytic Geometry for a joint 18.01 MIT OCW and self-study curriculum. I understand that his book involves quite some rigor and ruthless problems, but...

So I am a sophmoore in high school and i am really interested in quantum physics and i am fascinated by the double slit experiment. So i wondered, is there a way that i could reproduce the same results using common materials such as a laser pointer and aluminum foil. Any point at all would be...

I know we have talked about pickles before, and fermenting vs non fermenting, but I want to get a thread dedicated solely to pickling. I am feeling the pickling urge again. What is your favorite fruit or vegetable to pickle? Has anyone had fun playing around with flavor combinations of...

I've been interested in 3D printers for a while but am not good enough with computers to do my own home designs. I read an article about new software that, along with being easy to make designs into code, can also turn a 2D picture into a 3D object...

I don't know if this post is in the correct location but I have a very serious question. I need information from anyone with experience in acquiring home health care to MS patients with dementia or other severely disabled family members. Basically, the person in my family has such an advanced...

Hello... I'm trying to figure out how many magnets I need to put on one side of a piece of sheet metal in order to sufficiently magnetize all the surface area of the other side to a specific attractive force to other pieces of steel in contact with the sheet. It has been too long since...

Dear PF, How are you? I am fine. So we are going to be out of the house for a month and I figure it would be a terrible waste of electricity if we had someone house sit for us. Does anyone know if anyone makes some sort of device that will turn on and off a light in our house for certain...

Hi, I'm now in the project research to design a simple low cost and ease installation electric energy detective device. My idea is to put the sensor (etc..) in or within distribution board. Also the device can alarm consumer if they are using more energy. Just want the opinion from you...

is there any work from home as a mechanical engineer?

how to get a piping job from home?

Is it possible for someone to learn electrical engineering and work in the industry? How common is this? I mean coming from a the software industry I know that there are many including innovative ones are self-taught and have no degrees. Does this apply to engineering as well? How would it...