Idea Definition and 811 Threads

Hello, this is my first post there though I have been on this site before to look for answers to questions. I am a graduate in Electrical and Electronic Engineer, graduated in 2013 and live in London. I currently work for a engineering consultancy working on telecoms systems work...

I don't know how long this solar sail idea has been here , the Planetary society's second solar sail failed to achieve its objective right ? I am interested in the applications of this technique. 1) Is it possible to use them to deflect large asteroids and comets away from the Earth ? 2) Is...

If an Atom doesn't decide if it will be a particle or a wave until it is measured, and we assume thought is the tool for measurement...In quantum physics would an idea be a particle or a wave or both?

Looks like an interesting model. The Higgs originally starts at a much larger mass, but then a new field (axion-like) reduces its mass. Once it reaches the electroweak scale, symmetry breaking happens and that fixes the fields to stop further evolution. The model seems to have its own issues...

Hello, I have a working calculus library for java and want to use it in a program. I don't have very many ideas. I have limited Calc. II knowledge but a strong understanding of Calc. I. I have an intermediate understanding of java (took 3 courses at my high school of it), and a solid algebraic...

In order to transfer on time from community college and prepare for the MCAT I have to really scrunch my classes. I was planning on taking Calc 3, Liner Algebra, O Chem 1, and Physics 1 (mechanics) at a whopping total of 19 units in 16 weeks. Is this doable? I would not be working and all of my...

Hello, I was just brainstorming for futuristic inventions with context for a sci-fi, high fidelity game (because I'm too cool to revise for exams) - and I thought of one, but my physics and engineering knowledge is at best sketchy when it comes to gravity and nuclear fusion combinations, I was...

I want to write an article in arXiv. Let's suppose I made I mistake.Is there a chance that somebody can fix that mistake and publish it in scientific journal. And why people write their articles in arXiv? Is it a short way to peer review stage?

Some university research groups offer postdoctoral positions sponsored by industry and focused on industrial R&D. That means mostly technical work and little-to-no publishing. Also such positions often don't have strict time limits, allowing postdocs to stay as long as this arrangement remains...

I have been thinking about racecar safety, specifically protecting the driver's waist down area. I was thinking of a transmission tunnel, firewall area, and floor board (just by pedals) Here's The Idea: What if I used a Carbon Fibre/ Kevlar weave to be flexable into the position you want then...

rude man submitted a new PF Insights post A Brachistochrone Subway Is Not a Cost-effective Idea Continue reading the Original PF Insights Post.

I speak about my ideas quite openly, with many people as entreprenuership is one of my passions. (and hopefullly me and my friend will have started my start up shortly after this semesters finals). I speak about my research ideas that I have with my professor, but I am currently an...

So I had this idea and I want to run it by some people and see if it's 1) possible 2) worthy of pursuing further 3) a good idea. I don't have a degree in engineering or physics, I'm currently studying chemistry and am taking physics 2 (E&M) right now, so excuse me if I don't use the correct...

Homework Statement A 12V DC supply is connected in series to 2 capacitors, of 12 and 4 micro farads. A switch is in series also. The diagram shows the capacitors above the supply and the larger capacitance capacitor to the left. The names of the plates of the capacitors from left to right are...

So as we all know (or at least I assume) Global Warming is real and happening, I am a teen, 17, and not trying to get answers for homework or anything like that. I just want to know, is it possible to create fusion using the temperature found at active Geo-thermal sites to reach the temp...

Homework Statement [/B] Consider a spherical planet of uniform density ρ. The distance from the planet's center to its surface (i.e., the planet's radius) is Rp. An object is located a distance Rfrom the center of the planet, where R<Rp. (The object is located inside of the planet.) Find a...

Homework Statement [/B] When Danny was 13, he went deer hunting with his grandfather. He decided that he didn't like the "kick" of the gun, so he pressed himself against a tree before firing a 12-gauge (3.5kg) loaded with a deer slug (0.22kg). Evaluate this idea. It was a big mistake. It...

Shoulder abduction = 15° Abduction acceleration = 50/rad/s/s Abduction velocity = 20 rad/s Radius of gyration and COM location from joint = 25cm Mass of hand + Arm = 8 kg Force of middle deltoid =400N Middle deltoid only active muscle Force of theraband = 70N Middle deltoid insertion = 15° Φ=90...

Is it possible that the universe started with a collapsing supermassive black hole that released what it absorbed after eating the entire universe? If so , could it be possible that this an infinite cycle of death and birth of universes?

Hi I’m a high school senior taking physics and had this crazy idea for nuclear waste disposal. Given: Space is a good place to put nuclear waste Rockets can malfunction possibly leading to their nuclear waste payload being being dispersed I thought of looking toward a rail gun. I found a...

so i had this idea for a while now, if you would take a black hole, and put a laser next to the event horizon, facing away from the black hole, the gravity from the black hole would pull the photons in right? I was thinking that the force that it takes must be bigger than the power from the...

So I was reading this article about http://www.wired.com/2013/09/plutonium-238-problem/all/ and it got me thinking about possible substitutes. This is what I came up with. You make thin sheets of beryllium mixed with some kind of alpha particle emitter. You also make thin sheets of some...

Heres a design I put together a year ago and it got figured out to the point i might be able to make a prototype. What are some design flaws you guys might be able to point out, or some advice you think I could use.

I'm sorry for the question and maybe it's the wrong place at the forum to ask, but I need to know, what I have to do If I find a flaw in the General Relativity theory? Write a paper? what are the steps? Thanks.

Hello! I am a senior High School student from Spain. The next year I'll start university, and I am full of doubts. Personally, I am absolutely fascinated about Physics. I want to study it to learn about the world, why it is like it is and so on... I have seen the subjects and I think they are...

I was watching some old WWF matches and what we need is some very smart people to fill the science and engineering community. Now hear me out as it is an idea. My reputation is to think outside the box but say for example HHH needed his slede or nick foley one of the greatest People of all...

this is the idea...

Hello everyone! This is my first post, so excuse my improper etiquette (if any). Anyways, the Pinewood Derby, just in case you guys are unfamiliar with it, is an event that is held as a competition where small, homemade cars, race. The track is contains a ramp, which then leads onto a flat...

Sorry didn't look too deep into it but had a random thought (and a couple drinks) ; would it be plausible to generate power by harnessing angular momentum from passing molecules? Perhaps hydro and wind generators could get an efficiency boost?

i have a simple question, but I'm not sure it can be answered with our knowledge of absolute zero: if an object were to exist at absolute zero, that means it has no energy, correct? if that is true, then if you struck something at absolute zero with another object, would the object with no...

Homework Statement I need to find Λ using the equation below (I think). Homework Equations A [/B]+ ∇Λ = 0 where A(x,y,z,t) = B\begin{pmatrix} x+y\\ x-y\\ 0 \end{pmatrix} The Attempt at a Solution Is this at all possible?

My idea is about auto braking mechanism on vehicle. help me

I was looking to get any advice from a mechanical engineer about motion sensors. Would it be possible to make a motion sensor work underwater? i wasn't sure if the water would interfere. Thanks for anything, if this isn't an appropriate place for this question i would appreciate if anyone has a...

Hello PF people. It's my first post here, but I have been lurking around this forum for awhile now. I'm currently learning differential calculus using a text by Stewart and I want to attain a better comprehension of pure mathematics. My question is: would it be a good idea to get another text...

I would like to start a new a career hopefully by this time next year that requires me to know basic and high school level math. I graduated high school 20 years ago and I really have forgotten a lot. I was thinking about getting a Ged math study book. do you think it would help ?

I've got an idea for a high performance Diesel, and I'd like to know if you guys think it's feasible, as me and my friend are mulling it over (be patient with me, I know I may not be explaining this properly). We plan to build a 24 cylinder engine, where the bore:stroke ratio is 5":4". The...

hi, I have an idea for an audio system in three parts. first an amplifer system that drives a single driver with a signal imposed (out of audio range or a small dc current that uses feedback to reduce driver distortion) to compensate for variations from ideal in the audio sine wave output...

Found this on the interweb and thought it was interesting

Perhaps one of the biggest problems facing life in america today is the fact that once someone has been convicted of a crime and done their time, they are still being punished. Personal Background: I have a criminal record, including 2 felonies and a long list of misdemeanors. Long story short...

So I started with limits and everything went well, and then into derivatives, and a problem started. First I know how to find the derivative of basic things using like ( limit definition of derivative) or (rules for derivatives) or ( product rule/ quotient rule/ chain rule)... My problem...

So i was wondering could you use two helio stats so there was two refraction points, the second one focusing the beam of solar energy back downwards? If so could you use multiple helio stats to meet at refraction point # 2 magnifying the beam that's pointed downwards? In theory it should work...

hello to everyone, first of all I apologies for my bad english the idea is - i will use 2 KW motor to spin a 50 KW alternator or generator. the cost to buy electricity is 17 p/kWh and to sell it to the grid is 5.1 p/kWh so my motor will use 48 kW in 24h with a cost of 8.16 pounds in 24 hours...

Hello, Physics Forums. I've been working on a sort of open textbook website since the beginning of this year and am almost finished. I have certainly enjoyed building it, but it has come to the point where I would like to hear a little bit about what other people think. So, as science-minded...

Would it be possible, instead of building a 22 thousand mile long space elevator, to make a large floating platform 15-20 miles high which would be supported by gigantic hydrogen balloons. You would then take off horizontally and travel into space from there since most of the energy costs are...

im only 17 and have recently joined an honors chemistry class and i found that people are trying to make new elements. now i have already heard about this before but recently i have been interested. i don't know if this has been tried before i don't know but i was wondering if you take element...

1. The problem statement Peter threw 10 (same) coins into an empty container (a tube/drum), which was floating in A LIQUID. The diameter of the container was 2,257 cm, and so because the container is a tube the surface of the tube was equal to π times the diameter squared. He measured, after 4...

Would it be possible to have a stack of thin magnetic hoops that, when energized, space out from each other to reach geo orbiit Kinda like a magnetic slinky?

After some years of work I have somewhere in first stage of creating a new gravity theory which would extend General relativity theory. There are many similar attempts from serious physicists and even many more from crackpots. I have no academic association and have only MSc in Computer...

This is not a joke. Suppose Albert Einstein was born in 1979, not 1879, and to date had not written any articles. Like the old Albert, modern Albert works for a government department. He assesses applications for arts grants. You see, unlike the old Albert, modern Albert studied art after...

So, a while back i read about this idea, but i can't find it anymore, so i was wondering if anybody else knows about it. here it is: We know that if a vector field is conservative, then there exists some surface whos level curves are perpendicular to the vector field. or inversely, that the...