Idea Definition and 811 Threads

Homework Statement 1. A frictionless slope has a hypotenuse of 2.0m and a height of 1.0m. A box of mass 40kg is pushed up along the hypotenuse with a force of 250N. Since work done is defined as the product of the force and the distance moved by the object in the direction of the force, we...

Make an order-of-magnitude estimate of the cost of one person’s routine use of a hair dryer for 1 yr. If you do not use a blow dryer yourself, observe or interview someone who does. State the quantities you estimate and their values.

I am freaking out man :smile: I have this program and in it I have the variable nPT declared as Integer. Somehow, after nPT is passed to subroutine, its value changes to a very large negative integer value. I cannot make sense of it. In the subroutine pasted at the bottom, the value of N (which...

ok so here is what i was thinking when a spaceship enters the atmosphere the reason for the high impact velocity is that the air is spinning at 66000mh AND that to keep an orbit you need certain speed with is different from the Earth's rotation... now if you slow down/speed up to match...

I am about to go into my 3rd year of my Electronic Engineering degree, and as part of that I will be taking part in a group project. Out project involves making a remote control surveillance car with cameras, sensors etc. We also want it to be long range (i.e. more than the 10m or so you get...

Something's been bugging me lately. A while ago I read a book on consciousness (A very short introduction by Susan Blackmore) that outlined a term for when an idea get's subconsciously worked out and then arrives fully formed in your conscious. You know the type of thing when a problem at...

lol...the task is sisyphean for sure. http://www.highiqsociety.org/Sisyphean%20Airlines%20Puzzle%20Challenge.pdf

sooo, i was thinking, why don't we use the heat from underground magma channels to boil water and drive steam turbines, seems like a pretty stable way to make power. has anyone tried this before?

i have to make a physics simulation using box2d and actionscript3.0. So can anybody give me an interesting idea for this

Everything we witness and see is moving. All the things on this planet are spinning around at 25,000 miles a day while rotating around the sun while the sun pulls us on it's own course. Have we actually ever seen anything that was sitting still? As you approach the speed of light time slows...

Isn't all math that is taught in k-12th grade a sequence of harmonies? Why does it have to end with just noise? There ought to be more star trek conventions and star parties. Here's a new idea... A young writers convention where we can receive genuine critique from k-12 students.

First, I hate heights. I have 3 sections of triangle type tower at my house. So, total length is about 30 feet. My idea is to make some sort of hinge so I could lower it over and raise it. I know I mentioned it before but now seems to be the time I need to do it. (My little boy is...

I am in grade 12 and have gotten admission at a good university. I have registered in the "general sciences" with an undeclared major. Now I'm picking my classes. My trouble is I don't know what I'm doing. I love Physics so I want to take this course called "Newtonian Mechanics and Relativity"...

I lack the mathematical skills to determine if this idea is plausible. Maybe somebody has already been down this road. The universe cools and the universe expands. At first this makes perfect sense because of the relationship between pressure, volume, and temperature. What if we have the...

The average rate at which energy is conducted outward through the ground surface in a certain region is 63.7 mW/m2, and the average thermal conductivity of the near-surface rocks is 3.96 W/m·K. Assuming a surface temperature of 8.70°C, find the temperature (in Celsius) at a depth of 35.0 km...

Hello, looking for help designing building/testing and implementing an idea, I have been thinking about using cheap flat panel magnifying lenses on a hinge and pivot, that track the sun, and then having a fiber optic at the focal point, and then having multiple fiber optics terminate at the...

I was thinking of idea for a sci-fi story and not being a physicist wanted to know if there are any fundamental weaknesses in the support conjectures. First I allow for some givens, which of course are far from "givens" within the scientific community. The first given is that consciousness...

I was watching a show recently where Roger Penrose explained a new idea he had on the Big Bang. It was very interesting, and I thought I was recording it. Of course, it didn't, now I can't remember exactly what he said, and of course, can't find it anywhere else. Perhaps somebody can feel in...

Hello, I'm 16 in the 10th grade honors section, and I don't really know what I want to do in life. I'm fascinated by physics and mathematics I'm also really good at both and I think it would be cool to study either pure math or theoretical physics but I'm concerned about the lack of job...

I came across a curious site on this topic: http://e-infinity-energy.blogspot.com/2011/01/t-hooft-veltman-dimensional.html On one hand, the blog history is filled with non-mainstream ideas. (They invented a new subfield called E-infinity.) On the other hand, the people there seem to be tenured...

This is something that came up at work, as there are four computers running with their air vents placed four to six inches away from the air suction (so that it would suck up the air which was blown out from the air vent fan of a PC.) While this may seem like a good idea on paper (as the suction...

I have been reading about the multiverse idea recently and when I came to think of it , as much as I find it extremely interesting, isn't it a bit discouraging as well? I mean, if there was "time" before the big bang and if there are infinite number of other "bubble" universes in the "11th...

"Protect" and "idea" Hello. So, I have this idea, whatever it is, and I think it would be suitable to file a patent, but I don't want that. I only want to officialy declare this idea mine and then give it to everyone to learn, implement and improve it. Is there a way to do this...

Ronald Mallett, PhD is a renowned physicists known for his proponents on the idea of time travel. Mallett uses his background in physics and mathematics to support his idea to build a time machine, using Einstein's Theory of Relativity as a basis. Do you think this is even possible? Right...

I'll first say I have many interests including physics, applied math, CS and EE. I was committed to EE until I started doing some research into the BLS. EE's are supposed to only have a 2% increase through 2018. As opposed to CS which has 32% increase through 2018. I understand this going to...

Hello there, Somebody I know has asked me if i could help him with the following: He has an idea for a game show and what is the best way to protect the format of this new game show.At present there is no gameshow that has the format that he has.He also asked me if I could put down on paper...

Check this out: http://edition.cnn.com/2011/TECH/innovation/01/19/smart.roads/?hpt=Sbin Tell me if this is anything more than retarded. I don't mean to sound insulting, but this cracked me up, that's how sad it is. There are so many problems with this, I don't even know where to begin. I'm...

Would you recommend washing hands, not only often, but especially after using a Kleenex? Such concern, not usually considered, could save lives this flu season.

So my professor is really bad and I've had to try to learn to learn this stuff myself. But I have no idea where to start and where to go. Problem: X(s) = \frac{3(3s+2)}{9s^{2}+12s+4}Attempt All I've been able to figure out so far is: -> X(s) = \frac{3}{(3s+2)^{2}} * \frac{1}{(3s+2)}} But...

Hello! I'm studying graphics programming right now, and in the end of this one semester long course we are going to make a project in which we will program an application that displays some nice graphics. I want to take this as an opportunity to show that I have a talent for programming (having...

the question is could a STRING be a very long object with high energy wrapped into the size of the atom ?? the idea is if we could unroll an string would it deliver some kind of its energy ? for example if we have some kind of Einstein equation but for string in the sense that Energy E...

I know this has been done on a larger scale but I was thinking of playing around with something simpler. My idea was to try to build a simple little robot that follows the point of a laser. It doesn't have to be elaborate: even if it just follows the laser around a few inches in front of it...

Hello, I am a junior physics student, I've come up with an idea that for a theory in concept it works but the math is considerably beyond my current level. Is there anywhere i could go to submit the concept or to get help with the math?

Hi! I need a topic for my final year project for Engineering. Since 'Power Engineering' is one of the stress areas for Mechanical Engineering (I'm doing B.Tech in Mechanical Engineering), I thought it could be something related to that. I have applied to National Power Training Institute...

Hey we've all seen those movies and documentaries where civilization has buil giant glass domes on The Moon or oher planets. I say this is structurally unsound. It's going to break or atleast crack. I divised an idea called The Space Tent. We take a giant plastic bag the size of our martian...

Wanting to put numbers into a spreadsheet for two chambers joined by an escape tube. If the bottom chamber sprang a leak (circular - for calculations) how quickly it would full with water & resultant air pressure in upper chamber. What air pressure at any given time, in both lower & upper...

I need an idea or inspiration for a discreet birthday gift :( A little bit of background on me. I am 20. I am studying Aerospace Engineering with Mathematics, Physics, and Pre-Med minors. I have been diagnosed with Asperger's syndrome. I am also a grapheme and auditory synaesthete. And I have...

Looking at these images and video, and thinking about difficulties in holding plasma within EM field, I had an idea: [PLAIN]http://www.swisseduc.ch/stromboli/etna/etna00/etna0005photo/icons/e71-small.jpg http://www.swisseduc.ch/stromboli/etna/etna00/etna0005photo-it.html Video...

Next term, I have decided to not take a computer science anymore because it's pretty much meaningless to take it if I can't follow up with this course. I am a first-year student and I hope to transfer to another university after this year because I will have to move and it is going to...

Hi, In general, for most of the physical phenomenon, somewhere in the analytical procedure while developing the theory of the phenomenon, series expansions used (generally Taylor expansion) which is a key point of the analytical steps. My question is why we should use such expansions I...

Note: I am not a physicist but i like to read about it here and there. But my idea is this (probably thought of before): I have been reading Physorg.com and there is some new research about subatomic particles that are able to communicate at endless distances. This is considered...

Just wondering if an idea I've had for a few years would actually work. If I had an engine where compression took place externally and the engine was only used for combustion for example. This engine would be direct injected. The fuel would be injected a very high pressures (common rail)...

"Infinitely repeating decimals may not exit, they may terminate somewhere down the line but we can never tell." I've heard it claimed that numbers that pi or e may terminate eventually and that there is no way of knowing. Is there no mathematical way to show that a non-rational...

Q: In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner? The picture shows a normal rectangle. The upper...

One of my teachers, for AP Physics, has made it mandatory for my entire class to register on this particular forum and post three times per week. Although this is not a hugely time consuming assignment, me and many of my classmates have found it difficult to find threads to post on or places to...

I am trying to add some linkage bar or gear mechanism to a wheelchair which can use to rise or lift the patient to the half standing position. This is to help the patient to stand up from a wheelchair by himself witount using motor or any circuit. To rise the body weight by using hand force is...

I want to make a physics costume for an anime convention I plan on going to in May. I want to somehow create a costume that demonstrates a concept, not a person. For example, some ideas that I have had are Schrödinger's cat, the photo-electric effect, or some sort of equation. I realize that...

Has the following explanation for the large scale structure of the universe been considered and discounted?Consider a universe many billions of times the size of the observable universe, so big that the homogeneous nature of the universe could even be an illusion. At a very large distance...

After hearing some stories of some people about to commit suicide by buying gun and planning to kill his whole family as result of hardships in his life (fortunately he changed his mind and got over it). and some stories on news of gun shots. So my idea is What would happen if there was a law...

Homework Statement Homework Equations equation 37.23 37.30 are the following 37.23 x'=gama(x-vt) x= gamma(x'+vt') t=gamma(t-vx/c2) t'=gamma(t'+vx'/c2) 37.30 u'=(u-v)/(1-uv/c2) u=(u'+v)/(1+uv/c2) The Attempt at a Solution i tried the following... since d=vt... i...