Idea Definition and 811 Threads

If you have two overlapping circles with straight lines going out in all directions, and you go from on one line from one circle to the first point where it intersects a line from the other circle and draw a line to the next line beside it from the same circle at it's first intersection with a...

i'm stumped as for a creative idea...i tried gas arbitrage and rate of change of human population, but apparently those won't work. if i don't find one, i'll just explain Newton's calculus theories, but does anyone have any ideas of possible topics?

An idea crossed my mind on how to explain the weak equivalence principle(WEP) without using the gravitational law: F=G m1m2/r2 Part of what WEP sais is that assuming we are in a uniform gravitational field, if we let two objects of different masses, they will fall with exactly the same speed...

So the other day while I was folding up some laundry I had this idea pop into my head. Now I'm not an expert or anything and I dropped out of physics in high school, but I do think quantum physics are interesting like most people. I figure this would probably be the best place to post this due...

Hello, I need to write a paper about physics and I hvae no idea at all what I could write about. Just about a topic related to physics. Could be based on an article, a book, video etc. I was going to write about an interesting article about physics , but I can't find anything :frown...

I've been look at some stuff about applied physics recently to see if I would be interested in doing that, but it seems like mostly everywhere else it is different than it is here at Purdue. Applied Physics here at Purdue takes all of the core classes of the Physics degree (physics and college...

Any idea about how determine body movement upon the accelerations? Hi, I am trying to implement an algorithm which would determine the person's activity upon the received acceleration measurement data. I am measuring the accelerations using accelerometer sensors on mobile phones and send...

can somebody please tell me if there is any way to find all values of k for which 6k2+4k is of form 6ab+5a+b? eg. for k=1, 6k2+4k=10=6x0x2+5x2+0

Homework Statement Liquid flows through a 4.0 cm diameter pipe at 1.0 m/s. there is a 2.0 cm diameter restriction in the line. What is the liquids velocity in this restriction? Homework Equations The Attempt at a Solution I know that solution is 4.0 m/s but in don't know how to...

Half Life / Alpha Decay Question -- No IDea Homework Statement A space rock contains 3.20 g of 147 62 Sm and 0.110 g of 143 60 Nd. 147 62 Sm alpha decays to 143 60 Nd with a half-life of 1.06 1011 yr. If the rock originally contained no , how old is it? Homework Equations ...

I am a sophomore engineering student taking a thermodynamics/fluid mechanics course right now. We have to write a short 4 page research paper on a topic of our choosing, that deals with thermodynamics and/or fluid mechanics. I am looking for ideas on a good topic, keeping in mind that I have to...

does anyone have a idea on how lifters work yet? i am agreed with those that believe it is not a ion wind effect. i believe this technology should be researched and it is my goal to use it as my field of research. i was just hoping someone is already working on it. i mean imagine, hover...

Hello, I am a first year undergraduate university student majoring in Engineering and Computing Sc. One of my courses is Linear Algebra. We have been given an assignment in which question no. 2 is out of syllabus. It is on Least Squares Regression Analysis. This has not been taught to us. We...

I want to take a statistical physics class next semester which requires that I take ODE first, and recommends that I have taken linear algebra as well. Since I will not be able to take ODE until 2 semesters from now, due to the physics-major version only being offered in the spring (i...

I took an engine out of a snow blower (a 100cc-4hp-2 stroke) and was planning on hooking a turbine/fan assembly from a leaf blower, up to the carburetor. I plan on taking a 200/300 watt electric motor with a speed controller (HOOKED UP TO TWO 12VOLT 12Ah RECHARGEABLE SCOOTER BATTERIES) and...

what is spin? i have a vague idea but I am not very sure about it; also how does it affect particles?

I'm having a really hard time figuring out where to start this problem, let alone finish it. Can anyone help me through it? I attached a scanned picture of the problem. Thanks, Matt

Alright. As stated in the title above. So, a subspace is a set of vectors that satisfies: 1) It contained the zero vector; 2) It's closed under addition and subtraction. By "closed", it means that when I add another vector in R2 or multiply by a scalar k on A(x)=m, it will end up with...

Homework Statement Please tell me how to integrate this... Homework Equations [(2x + 4)][(2x^2 + 3x + 1)^(1/2)] The Attempt at a Solution

What are some of the problems with Chew's bootstrap model? Is it still a theory to be recognized and seriously considered?

Is it generally assumed that there is a smallest building block of matter? Or is it assumed that there is always a smaller particle within any particle? because i was thinking in my calc 2 class the other day... If you have, say, a water bottle on a table, and you assume that there is always...

my friend thought of an interesting idea and i was just wondering if it would be worth the money to do it, or if it seems practical. the problem with roller hockey is that the puck, even with wheels on it, doesn't slide too well. its pretty difficult to handle the puck on wood and its 10x easier...

Tension on a rope--no idea how to even start. Homework Statement A rope is used to pull a 10kg block across the floor with an acceleration of 3m/s^2. If the frictional force on the black is 50 N, what is the tension on the rope? M=50kg A= 3m/s^2 Frictional force is 50 N. Homework...

Hi, I have a question, obviously... I am currently at high school and doing my own self-study on physics. However, I was wondering if anybody here has a "partner" they do stuff with... I can imagine someone has a friend that they sit and discuss quantum mechanics with or how to solve some...

I am currently pondering over the idea of going to Princeton. I will be done with school in another year, 10th grade. Anyone have any things to say about it? I was also thinking about Dartmouth or maybe Penn State. And which one would you say has the greater Physics departments. I am really...

So I have been straining my mind for a science fair idea since august and have just now came up with a good idea. I was planning on studying the effects of addiction in mice. My idea is to get 9 mice and place them into 3 different cages and assign them each different numbers, A1 B1 C1, ect. I...

This fall will be my first semester at a university. I have a pretty easy schedule in HS so I'm studying the Feynman lectures and working Irodov's problems. Since the university doesn't give credit for University Physics I&II (Mechanics and E&M) for the AP Physics C exams, I'm planning to test...

Homework Statement does anyone know how to do this plane mirror question? The rear window in a car is approximately a rectangle, 1.29 m wide and 0.330 m high. The inside rear-view mirror is 0.480 m from the driver's eyes, and 1.27 m from the rear window. What is the minimum height of the...

Homework Statement A motorbike with the velocity 40km/h is able to stop at a distance, D, when it brakes with maximal deacceleration. At what distance will a car with a velocity of 60 km/h stop? Homework Equations . The Attempt at a Solution I was trying to solve it through regular...

Suppose dark matter is normal matter, in an exotic state. Superfluids have some interesting properties in common with "dark matter". Superfluids are quite restricted in how they interact with their surroundings. Because a superfluid is, quantum mechanically, a single entity, all of its...

I had a idea a while ago about a possible energy generator. I was wondering if you set up a plasma arc, then circulated gases through the arc so they would be ionized. Then, the ionized gases were moved through to a wire net through means of a strong fan or magnetic fields. Would it be...

In this mock-up universe there exists two observers on a large disc of great mass, and there is a third observer a great distance away. In this scenario we take the observation of the spinning disc from the distant (third) observer. I was thinking about Special Relativity and Mach's Principle...

I'm interested in the idea of voltage. if the curl of E =0, then E = -grad(potential), and it's possible to calculate the voltage between two points as the line integral of E over some path. When there's a time changing magnetic induction, the curl of E = -d(B)/dt. so strictly speaking...

Hello everybody I have looked everywhere for some good guides, so the question is: You probably know the Fibonacci sequence (1,1,2,3,5,8…) but there is a lesser-known sequence called (Pythagoras stairs) generated by a similar recursion formula. This is a sequence of pairs (Xn,Yn)...

given the acceleration Ax=6t^2 Ay=-0.66PI*cos(0.66PI*t) and knowing that the starting point was (0,0) and that the starting velocity was V0=(-1,0) find the Velocity vector and the placement vector si what i did was- 1st integral on Ax Ay getting Vx= 2t^3-1 Vy=-sin(0.666PI*t) which...

I have an relevation. Where should I submit this, it has to do with quantum physic's of heat, and how that interacts with objects. How about this forum?

I believe janus drew the original picture, I just made it a mosaic. what do you think? I made this picture small so it isn't as easy to see the individual pictures, but open up the bigger one and zoom in. Bigger

In plain English, what is the idea behind Group Field Theory by Oriti? How does this involve LQG, SF, and CDT? There is not a popular exposition on the subject nor even a wiki article. thanks

Homework Statement Rotating the ellipse x^2/a^2 + y^2/b^2 = 1 about the x-axis generates and ellipsoid. Compute its volume. Homework Equations The Attempt at a Solution

research project idea!? Hey, I am currently a junior in high school, and I need help on choosing a research topic. While looking and analyzing many "web pages" over the prestigious Caltech, I noticed one common thing. They only wanted students who showed a strong admiration toward science and...

I have recently been reading Moment of Creation by James Trefil, and I have stumbled upon the question, where has all the antimatter gone? I asked myself, what if micro black holes produced by the tremendous energy at the big bang are the answer? If you have an understanding in hawking radiation...

Homework Statement So I am supposed to write up a report as part of one of those "design" problems in a Thermo text. I am supposed to find determine the respective contributions to the electric power provided to customers by the electric utility serving my area (Salem,Ma) attributable to...

So I am doing an independent study with a chemistry teacher next semester and I have to turn in a paper for grant money by October 1st. The only problem is that I can't think of a research project to do. It can be on any science topic, but I would prefer it be chemistry... any suggestions?

I am 100 % certain that I want to earned my Phd in physics . I have some idea ofwhat physics subjects I am interested in. The problem is, each physics subject I am interested in all are in different physics topics. The physics topics I like lie from the structure of neutron stars in astrophysics...

would this be ok for this question because i thought we had to find normals and things and every site i go on about plane equations is different and i need to know this for an exam tomorrow. find the equation of a plane that passes through the points (2,-2,1)(4,-1,6)(3,-3,-2) (1)2a-2b+c=d...

I've been looking around with google and I understand WHAT frequency is but I don't understand how it really works with light. For example, looking at a star if we are moving from it (or it's moving from us, or both) the light is red-shifted, but if we're moving towards it then it's...

Yesterday, my hubby and I were out running errands in the pickup. We somehow ran over a big piece of metal and blew out a front tire. No problem, we're not totally mechanically incompetent. We get the spare tire out, loosen the lug nuts, jack the truck up...and it's just barely high...

Hi, I used to take private tutions in chemistry from a researcher in inorganic reaction mechanism (55 years old). What do you think will be a suitable inexpensive parting gift to give to him? Last year I gave him Clayden, Greeves, Warren and Warthous's Organic Chemistry. Thanks for your help...

OK so I'm familiar with the idea that EM radiation propagates through space in straight lines at a uniform speed, that of light. The idea that light moves in waves, that each wavelength carries a uniform energy and that the wavelength differs yet because the same speed is maintained each...

what schools should i try? how much is the registration fee? know anyone who liked it?