Trodden argues that particle physics and cosmology "no longer exist as independent disciplines"
http://arxiv.org/abs/hep-ph/0605284
The Cosmology - Particle Physics Connection
Mark Trodden
Plenary talk, delivered in slightly different forms at the Particles and Nuclei International...
Is it just me, or is there a huge connection between Uniform Circular Motion and Gravity?
A body of mass caught in uniform circular motion exerts a constant centripetal accelerating force, does it not? I don't know if it's just me, but that sounds like the exact description of gravity. So, I...
Hi, I have a question about 'breadboards.' These provide a means of wiring up a circuit. I'm a bit behind and I'm trying to figure out how to connect circuit elements in parallel using these boards.
I know that each row on the board represents a 'node' of a circuit so connecting circuit...
I have two wireless mice both made by microsoft. These things always stop working. What a rip off! You have to turn the batteries and fiddle with them until they make good contact so that the light will shine brightly enough to work. This problem is the same on both of them! They also go through...
I have been using 4 Mbps high speed for about 6 months now and have been pretty happy with it. Just the other day my internet service provider started offering 9 Mbps for 15 extra dollars per month. Do you think that this increase in speed is worth an extra 15 dollars? Do you really think that...
It is rather well known that the color of flowers on Hydrangea depends upon the pH of the soil in which it is planted. Low pH in the soil means blue flowers and high pH means pink. Here is a quote from the Texas A&M site on Hydrangea:
Sometimes a single plant may have shades of both pink and...
How does ST vary with temerature? Is there a mathematical relationship?
Also, does the sound water make on splashing have anything to do with its ST?Like,hot water makes a different sound from cold water etc.
so i was reading about QED, and it said that when 2 charged particles repelled each other, it was because of virtual photons. is it true then that static electricity is caused by virtual photons, or is it an entirely different force all toghether?
OK, i know i am confusing something here big time, so...that's why I'm posting.
In my book it says that regular inverter has both positive and negative threshold at 2.5V, while Schmitt-trigger has VT+ = 2.9V and VT- = 2.1V.
So my question is how to make a connection (if there is any or how are...
Can someone help me find out how much lactase will breakdown a gram of lactose? I asked at our public library, with no success.
(Please cite reference: e.g text, Biochem course, personal experiment data...)
I am trying to make a calculation and created thread lactase query on the...
Why do unhappiness and so many worries lead people easily to sickness ?
What happens in our bodies when we are unhappy, sad, and worry about someone/something so much ?
Thank you...
I was reviewing my book when I got to thinking about a special type of connection, the "member fixed connected to collar on smooth rod" It prevents a force in the direction normal to the rod, and also prevents a moment. The first part is fine, but the moment part worried me a little bit. Since...
Hi! I connect 9 volts to a 1 ohm resistor and thought I would get I = U/R = 9 A. But when I connect the ampmeter, I cannot read anything! Where is the problem?
Hi. I understand the equation, but I don't understand logically in my head why it is that way. Maxwell's equations, etc show it mathematically but I'm looking for a logical explanation of why it is this way. Like for instance, the logical connection for F=MA would be "more force is needed to...
I wonder if there is a connection between that path integral formulation of QM, the nature of particles as extended objects, and spacetime. Dynamical Triangulation trys to construct the classical 4D world as a quantum superposition of various kinds of spacetime. Could it be that the path...
Has anyone ever seen or herd of an internet connection icon showing a small yellow dot orbiting it, similar to the EarthLink emblem? Specifically, a wireless internet connection icon on the taskbar of a Windows XP SP2 system.
I was on the phone with my girlfriend when she told me about it...
To have a connection in GR one imposes several conditions. Among others, one condition is that the connection shall be torsion free, which leads to symmetric Christoffel symbols. My understanding is that this condition is imposed to maintain the theory as simple as possible. The absence of this...
why do we feel good when we get our hands on some food? maybe a few scientific reasons like energy, survival, etc. but I am really wanting to know why we psycologically want food? this is in relation to the dog in Pavlov's conditioning experiments
Hey guys
Real quick. Is it possible to have internet connection sharing with a computer that uses dial up internet access?
My parents have two computers in their house, and they only have dial up internet access available. I want to hook the two computers together with wireless...
My friend has a problem. He has a computer that has one working internet and his other computer's internet is down. They are in separate rooms but are connected by an extension cord. They are both connected to the same modem, any ideas why one is working and the other isnt? (They share the same...
Hi everyone-
I'm a junior at U. Penn doing a research project on thermal expansion in complex perovskites. I'm having trouble with a computer program that I'm using to control and obtain data from our dilatometer. The problem is that the software was made in the mid to late 80's, and it only...
Hi everyone-
I'm a junior at U. Penn doing a research project on thermal expansion in complex perovskites. I'm having trouble with a computer program that I'm using to control and obtain data from our dilatometer. The problem is that the software was made in the mid to late 80's, and it only...
I was in the bus traveling at 100km/h going to N and i saw another bus going to direction S at the same speed and the same bus
and when the other bus that was heading S passed by ( it was 80~100cm between the buses )
i felt the bus shake and heard a swoosh sound ( the window was open on my...
i have a dsl modem connect to pc 1 via Ethernet lan1 and pc 2 is connect to pc 1 via etherent lan2 and sharing internet. pc 1 works fine but pc 2 experienced problems like
Messenger service auto disconnect every 50 sec . can not browser some site such as Microsoft.com any suggestion thanks
I was watching the Elegant Universe on PBS, and the show was talking about the string theory. there was one thing that i didnt really get though. It was the relation between strings and branes. I think i heard that if you were to add energy to a string, it gets bigger, and is stretched into a...
I had an idea the other day that if I could set up a wireless connection from my laptop to my pc which is connected to the internet via cable I could work on my laptop down the road (in a pub or park depending on the weather) I guess it would involve some protocol like bluetooth has anybody done...
Last December, I noticed that the December issue of "National Geographic" magazine had a feature story (30+ pages long) on samurai. I immediately suspected that this was an advertisement/PR for Tom Cruise's latest movie "The Last Samurai," probably paid by him or his camp.
What do you think?
Does existentialism have to do with idealism? I mean, in the sense that nothing exists outside of the minds' awareness of it? Sort of like Berkeley's idea? Do they have anything to do with each other?
I've been studying the rule of 72 lately, which gives the time in years that it takes for an investment to double based on the annual percentage rate of growth.I have tried to compare it's formula t=72/x (x being the number in front of the percent sign) with the exact value for the doubling time...
A good read. This gets a little more serious though. Please see what follows the mythology below.
http://www.vanhunks.com/tokoloshe1.html
This is the story that I was actually reviewing when I ran across the brown, hairy, one-butts with a lisp.
Formally known as The Zimbabwe School...
An incredibly loose thought, which i do not care to think about any further, is expressed here...
The Bible fames light alot... It characterizes light as a life giving component and a gift.
Light, physically, is possibly the most fundamental component of our universe.
a connection...
This has been bothering me for a long time. This thread (for those who will argue) will also go under the particle physics section too.
Ok, in our world we live in, we have our basic particles (strings, quarks, gluons, electrons, whatever) these particles held together by forces make up our...
how can the God connection be developed if you don’t have one?
it is not difficult. start by consciously having that as a goal. try the following prayer: God that i be with you in conscious contact, that i feel your presence in my life. then observe obstacles you have in place against feeling...
Members of Bush's Cabinet, all from big oil and energy and mining? You bet.
http://news.bbc.co.uk/1/low/world/americas/1138009.stm
http://www.opensecrets.org/bush/cabinet.asp
In the Physics forum, jby started a LQG thread which at one point included some discussion of Connections. It might be helpful to have a thread focused on the connection which is taking over the central role from the metric for some purposes.
GR used to be the study of the metric on a smooth...
My first post, about rotation groups..
A result about rotation groups.
To me this seems clear, simple and very intuitive, but in all the papers and books I've read on the subject I have never seen it presented. Maybe some of you have seen it, or maybe it is new. It is very simple to state...
Here's the idea. We can help each other study for our qualifier exams by posting qualifer-type questions along with the solutions in this thread. I think this thread will also help those studying for the physics GRE... or even those just wanting to get good at solving exam-type physics...