Recent content by Wentu

Now now... Say this is MedicineForums and I am not a medical doctor. I come here for some advice on some pain I am feeling and what do I get? "Go see on Google!". How helpful! Thank you so much, I didn't know about this "Google". Come on! Yes, of course I did my personal research but if I feel...

Hello, I have a general understanding of how we are aware of the presence of dark matter in the universe and the fact that we still don't know exactly what is that dark matter is made of. I would like to know which instruments are used to try and find an answer. For instance, from what I...

Thank you for your replies. I am going to read what Simon suggests, seems deeply interesting. I would like to add that Orodruin probably better got what is my doubt. I try to explain further. Let's say we are the only intelligence in the world. If it weren't for us, there wouldn't be any...

What i mean is: are there currently Higgs Bosons in the universe or the only place where they exist now is if man (or some other technological being) recreates special conditions like in a particle accelerator? Another related question of mine is: some particles "receive" their mass from the...

I got the answer from "Michael": It is the coefficient of x^R in (a0+xb0)(a1+xb1)...(aN+xbN)

Hello I have N couples of real numbers higher than 1. Let's call them like (a0,b0), (a1,b1),...,(aN,bN) I have a number R <= N. I need the sum of all the possible products of N elements, chosing one from each couple but exactly R times the "b" element and N-R times the "a" element...

Hello I have a set of sets of real numbers greater than 1. Each set can have a different quantity of numbers. Set A1 {a11, a12,...a1m1} Set A2 {a21, a22, ..., a2m2} ... Set AN {aN1, aN2, ..., aNmN} If I want the sum of all possible products that have one element from each set, that's...

Serena, this is exactly what I am asking. I understood it should be like you are saying, but Baez is saying that in COMMON systems Entropy increases FASTER with INCREASING energy and this means temperature rises... and this is contrary to what you said (and to what I understood so far) I am...

I can't understand the following from Baez: " We define the temperature, T, by 1/T = dS/dE, so that the equilibrium condition becomes the very simple T1 = T2. This statistical mechanical definition of temperature does in fact correspond to your intuitive notion of temperature for most...

You are right... I was considering distinguishble particles but this isn't enough, so yes, the term should be divided by 2. I wonder if this is enough to change the behaviour from linear to less-than-linear... I think the number of microstates still increases as a power with the increasing of...

The first N is for a single particle having 2*dE energy and all other particles ground energy

Hello I may well be all wrong about this but I am trying to understand from a microscopic point of view why Entropy is a concave function of internal energy. I found this in the following .pdf: http://physics.technion.ac.il/ckfinder/userfiles/files/avron/thermodynamics_potentials.pdf I...

I am sorry, so sorry to iterate for the milionth time the same questions but it would be so nice to grasp this concept of expansion in a more concrete way. Marcus often says: one of the best aspect of the balloon metaphor is that the small coins on the balloon stay at the same latitude...

So many threads on this topic and i still have very confused ideas. Using the ("useless") balloon metaphor, are physical objects better described by dots or ants on the surface of the balloon? Because if i think of dots, when I double the surface of the balloon, the dot's surface also doubles...