Physics

Neutrinos only interact Weakly. Er go, neutrinos are generated into Weak eigenstates, which are "mixtures" of the canonical mass eigenstates; and neutrinos remain in those Weak eigenstates, until detection. For example, electron neutrinos [math]\nu_e[/math] are a mixed Weak eigenstate, representing a mixture of the neutrino mass eigenstates [math]\nu_1, \nu_2, \nu_3[/math], specifically [math]|\nu_e> \approx 0.9 |\nu_1> + 0.5 |\nu_2>[/math] The following analysis employs normalized units [math]c \rightarrow 1[/math]; and assumes that the neutrino mass eigenstates, are also eigenstates, of mass [math]\left( \hat{m} \right)[/math], momentum [math]\left(…

Having just conducted a experiment in which I levitated a small neodymium magnet above a liquid nitrogen cooled YCBO superconductor, I was wondering if anyone knew of any factors that affect the height at which the magnet levitates at (e.g does magnet strength affect it?), and whether this applies inversely (i.e does a stronger magnet allow a superconductor to levitate higher above it?). In addition, I was wondering whether anyone could think up an inexpensive (under £100, ($~170)) way to keep liquid nitrogen above the superconductor, which is 1" in diameter, in order that it remains at its critical temperature. I had thought of a half ping-pong ball and have yet to try t…

The most coveted prize in particle physics - the Higgs boson - may have been glimpsed, say researchers reporting at the Large Hadron Collider (LHC) in Geneva. They need more evidence to claim a discovery. Sources:http://www.bbc.co.uk/news/science-environment-16158374 http://richarddawkins.net/articles/644214-lhc-higgs-boson-may-have-been-glimpsed

As I have learnt it's very difficult to be a stationary observer in space. However we often talk about speeds of certain objects. For example: The Earth rotates at 1600 km/hour The Earth rotates the Sun at around 107000 km/h The Sun/Solar system moves in a patch of stars at around 70000km/h We orbit the Centre of the milkyway at around 792000 km/h We are moving as part of a cluster of galaxies at around 2000000 km/h Although all these speeds are in different directions it still has to be a "speed" We measure light to be a speed of 670000000 km/h As the law of physics if something speeds up, time slows down. That is why light is the speed limit of our …

Studies show the Andromeda galaxy is on a collision course with the Milky Way. Estimations are that in about 3-5 billion years, the galaxies will intertwine, and completely destroy each other. This does not bode well for humanity. Hell, its been said that we have front row seats to our own destruction. Personally, I would give almost anything to witness this first hand, but its just not going to happen, and personally, I don't want to live that long. I have also read that in fact, the combining of the galaxies will go un-noticed due to the vast distances contained within the galaxies. Stars and planets will not collide, merely pass by eachother unharmed. Mumbo jumbo? …

who are some the top world-renowned leading figures in physics, currently

So lately I have been reading up on the Multiverse/Many worlds interpretation theory, I just wanted to know your opinions on the following: I will try to keep this as least technical as possible. As you know, the MWI consists of the idea that any decision you ever make will split the universe into as many possible outcomes of that decision as possible, so say for example, someone asks you if you want tea or coffee and you answer tea; at this point the universe will split and another "you" in another universe will have chosen coffee and yet another "you" will have said nothing and so on. If you consider this, you can safely say that anything that is a possible outc…

I apologize if this goes in a different forum. I don't understand why I keep hearing comments about multiple universes with another "me" in them. The butterfly effect isnt a theory. Its a fact. As a result of that fact, the chances - even with multiple universes - that there is another me, seems almost impossible. Let alone 5, 10, 15, 100 other me's all living in my same apartment, but one ate pizza today and the other is on a diet. The probability of there being other me's decreases exponentially with more time. The more time, the more choices, and the more possibilities and variables that would lead circumstance to me, here and now. Given the fact that…

How can we turn mass/object to energy? I know that E = MC^2 but I have some questions: 1)What process should the object go through in order to all of his mass be turned into energy(for example if we posses a stone how would we turn it to energy -theoretically- does it need to walk in the speed of light or what?)? 2)Does the human race posses a method of doing so today? 3)If not when do you think it would be? Any help would be highly appreciated.

I was doing a bit of thinking and as you know you can not create or destroy matter. So a black hole must go some where. A white hole is theorized to exist for that purpose. But what if a white whole is the equivalent of the big bang? What if every star that collapses and creates a black/white hole starts a new big bang in another universe/dimension? Not sure if this has been thought of yet as I am only in high school but I'm just looking for thoughts on the matter.

Hey I found this on Youtube and it really satisfied my scientific lust. I scored 9/10 because I stupidly pressed the wrong button on one of them, see what you get and share it! http://www.youtube.com/watch?v=wR93FxjUv8o

In Christianity there is such a thing as the infinite suffering of the souls of the unsaved or those who are forever seperated from the love of God. Many Christians believe that those who are not saved will be made to suffer in Hell for all of eternity. What I wanted to ask is: what does PHYSICS have to say about infinite suffering or infinite pain?

Two thermally insulated cylinders, A and B, of equal volume, both equipped with pistons,are connected by a valve. Initially A has its piston fully withdrawn and contains a perfect monatomic gas at temperature Ti, while B has its piston fully inserted, and the valve is closed. The thermal capacity of the cylinders is to be ignored. The valve is fully opened and the gas slowly drawn into B by pulling out the piston B; piston A remains stationary. Show that the final temperature of the gas is Tf = Ti/(2^(2/3)) I've been thinking about this one for hours, could someone have a look and let me know if you're successfull?

Two thermally insulated cylinders, A and B, of equal volume, both equipped with pistons,are connected by a valve. Initially A has its piston fully withdrawn and contains a perfect monatomic gas at temperature Ti, while B has its piston fully inserted, and the valve is closed. The thermal capacity of the cylinders is to be ignored. The valve is fully opened and the gas slowly drawn into B by pulling out the piston B; piston A remains stationary. Show that the final temperature of the gas is Tf = Ti/(2^(2/3)) So far i can gather that, as its a thermally isolated system, there is no change in heat, but work is done by slowly moving piston B. So dU = dW = -pdV. And the equa…

There is some thought experiment constructed to help finding intuitions about the 'conflict' between CPT conservation and 2nd law of thermodynamics. Like for wormhole loops, I see it completely unrealistic - I only think it is inspiring mind exercise and may lead to some better understanding of thermodynamics (and temporal logic). General Relativity Theory determines shape and rotation of light cones in each point of spacetime (like near black hole), but it is time (and CPT) symmetric - doesn't directly distinguish between past and future of such light cones. Without any additional reasons like entropy gradient, we could time-flip the light cones. Another from 2nd law …

Ok, if we put a telescope for sake of argument say 10 light years away from the earth and set it to transmit it's data to us. Could we then see outside of hubble volume by 10 light years in that horizons direction and receive the images 10 years later?

Since space expands and everything is moving away from everything else. Why is planck's constant, constant? And more specifically why doesn't planck length expand too?

Not everyone likes the idea of universe ​​created from a point singularity, so recently grows in popularity cyclic model - that our universe will finally collapse, use obtained momentum to bounce (so-called Big Bounce) and become the new Big Bang. One might criticize that we "know" that universe expansion is accelerating. But it is believed to be pushed away by "dark energy", so accordingly to energy conservation, this strength should decrease with R^3 ... while attracting gravity weakens like 1/R^2 and so should finally win - leading to collapse. But it seems there is a problem with the second law of thermodynamics here - on one hand entropy is said to be always inc…

If the world has enough gravitational pull to keep the moon in orbit then how can we send satellites into space? And if the sun has enough gravitational pull to keep planets much further away from the earth in orbit then why does the moon not just orbit the sun? I'm really confused

Is it glass? Or the outside of a glass bubble with gas other than air on the inside, or is it another material?

Alright so we all know that E=mc^2 where E is energy, m is mass, and c is the speed of light squared and we all know that Acceleration is energy, and the more Acceleration a object has the more mass it has We also know that the more mass a object has the more gravity it has NOW with that being said Heres the question, seeings how the Universe is speeding up aka (*gaining acceleration*) So would it not apply that mass is getting more massive? (*aka compressing?*Get Heavier*) as the universe expands? it seems like it's Imploding and Exploding all at the same time were space is exploding, and matter is imploding and not pulling apart atom by atom like everyone says i…

which of the following is the strongest alpha emitter by strongest i mean produces the most alpha particles -Americium from smoke detector -0.25 gram of thorium dioxide ((very fine powder) -2 grams thorium nitrate -2 grams uranium nitrate -radium from alarm clock, weight unknown but the clock face is about 5" and he numbers are fairly large -5 grams of U238 (5g is the total weight of several chunks of the metal) -several ounces of uranium glass (im pretty sure this one isnt the winner) -last and definitely least.... several pounds of Bismuth

Hi all, This has always bothered me: Photons travel at the speed of light. Why do we need to accelerate them in the LHC? Other, slower particles yes but not photons Surely they're going as fast as possible already? Also, why dont I get collisions occuring when I point two lasers at each other?

1. What is energy conditions known has Casimir effect. 2.The Higgs boson why do some say it is force not a particle ? http://cosmiclog.msnbc.msn.com/_news/2011/12/13/9402473-higgs-vs-hype-a-mini-guide

hey, please can you tell me how i can calculate the turbulent thermal boundary layer thickness in pipe or over a plate i thank you