Condensation Definition and 141 Threads

When I put a near 0°C water in a glass which is at room temperature (around 25-30°C), some water in air (humidity) condensate over the glass. That's what I believe. I understand this like, the water present in the air as gas has molecules with more energy (kinetic, but overall?) than liquid...

Hi i tried in the other section with no luck. Let me try here if there are anyone here that can help me. the question is: Suppose one catches in 5000-Na atoms in a spherical-shaped cloud with diameter of 2mm. And suppose that the atoms are uniformly distributed in that sphere. At what...

All number of bosons in case of Bose condensation is N=N_0+\sum_{\vec{p}\neq 0}N_{\vec{p}} I found in one book that N_0=\hat{b}^+_0\hat{b}_0 In that book author say that \hat{b}^+_0\hat{b}_0=N_0 and \hat{b}_0\hat{b}^+_0=N_0+1\approx N_0 so [\hat{b}_0,\hat{b}^+_0]\approx 0 and...

hi this is my first post on this forums hope every would help me here on this question Homework Statement outside vertical tube = 1m outside diameter = 80mm exposed to saturated steam at atmosspharic preasure & is maintaiined at 50 c by the flow of cool water through the tube. Rate...

I have an out-door cabinet (with PCB) that over time is being damaged due to condensation (humidity). I would like to minimize these damages over time (corrosion, etc...) The cabinet is closed but not 100% sealed. Cabinet size is 80X20X20cm. How do I avoid the damages due to condensation of...

Hello, I'm thinking about a natural convection problem where you have turbulent flow on a vertical wall. It's compressible flow, and it's a two-phase problem. You have two boundary layers, one for the air-vapor mixture, and one for the condensate. The question I'm pondering is this...

Hi, I am trying to simulate condensation of water in air. I am using the shan-chen multi-phase multi-component model in order to achieve this (a variation of the Lattice Boltzmann Equation, not too important). The goal ultimately is to study the effect of condensation in fuel cell membranes...

Hi, I'm now studying evaporation and condensation and I have a question. Why even when water boils, its temperature doesn't exceed 100 C? Where did the energy gotten from environment go? What was it used for? Examining structure of water and vapour molecules are given as a hint, but I see no...

I did some research on how dehumidifiers work and from what've been able to find out, it takes in room-temperature air, cools it, thus condensation, then runs it back through heated coils so bring the air back to room temperature. I got around to taking apart an actual dehumidifier it's...

Which of the following macromolecules are held together by covalent bonds between monomers and are synthesized through condensation reactions? Choose all correct answers. Nucleic acids Triglycerides Carbohydrates Proteins This is what I think: -Nucleic acids form...

Doesn't condensation imply a change from a gas to a liquid? Were the nucleotides gases when the phosphodiester bond formed? Were the amino acids gases when the peptide bond formed?

Do any of you know of successful processes that encourage condensation, and then collect the water droplets that are produced? I am trying to design a system that uses minimal if any energy to run that would provide a potable source of water for the home. I am aware of the condensation...

Homework Statement Find Condensation Temperature of ideal Bose gas with internal degrees of freedom. Assume only ground and first excited state of internal spectrum need to be taken into account. Homework Equations The Attempt at a Solution I know j(T) for internal degrees of...

So it's here http://en.wikipedia.org/wiki/Cauchy_condensation_test My question is this: is the value of the base 2 in 2^k an arbitrary value? Or is there something special about 2? Can we just use something like e^k instead?

I'm wondering -- would you get the phenom. of Bose-Einstein condensation in a 2D system. My intuition is "no", but I'm having a hard time saying why. I suppose I could try and work it out mathematically (no time, right now) -- perhaps someone has? -- but a physical explanation would be nice too...

Hello. This is the presented problem: Suppose (b_{n}) is a decreasing satisfying b_{n}\ge\ 0. Show that the series \sum^{\infty}_{n=1}b_{n} diverges if the series \sum^{\infty}_{n=0}{2^{n}b_{2^{n}}} diverges. I've already proved that i can create \sum^{\infty}_{n=0}{2^{n}b_{2^{n}}} from...

Hi , i need some scientific source (book, article etc.) on phonon condensation in solids. Google scholar seems to fail in this topic. Can anyone advice me some source ?

Homework Statement Start with the kinetic theory formula for the molecular condensation flux, \Phi_cond = 1/4 n_v*c_v, where n_v is the number density of vapor molecules just above a liquid water surface and c_v is the mean speed of the vapor molecules. Derive an expression for calculating...

I've just read Quantum field theory of many-body systems Xiao-Gang Wen His web page http://dao.mit.edu/~wen/ I thought that his book might be easier than his papers. hehehe It's a textbook. I did get to learn a few things. Here is what wiki says about the subject. In physics...

What are some possibilies of Bose-Einstein condensation in say a 1D gas? Or a 2D gas?

Is it possible to have Bose-Einstein condensation in two dimensions? Why?

Hi ! I need to know whether condensation could appear within this roofing structure. The top layer (exposed to outside weather, hot and humid) is composed of (1) Glass reinforced fibre cement panels, underneath it is a layer of (2) thermal insulation, (3) an air gap, (4) steel structure, (5)...

Question:How do I calculate the optimum temprature for water to condense out of the atmosphere given the ambient temp, humidity, and hieght above sea level. Thankyou.

If A =\left(\begin{array}{ccc} 1 & 2 & 3 \\ -1 & 2 & 1 \\ 4 & 1 & -1 \\ \end{array}\right) and we want to zero the entries in the second row of A (i.e. make it 0 0 1 ). How do we get A =\left(\begin{array}{ccc} 4 & -4 & 3 \\ 0 & 0 & 1 \\ 3 & 3 &...

We should have experience that when we get off from an air-conditioned bus in the summer, our glasses become misty. It's due to condensation of water vapour on our cooler glasses. But why the condensation doesn't occur in the air-conditioned bus?

Evaporation and Condensation... If 58 grams of hot water at 71°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? in °C How much ice must melt in order to cool the hot water down to this temperature? in grams is...

According to Newton's law of action-reaction, wouldn't a finite (non-singular) universe at the onset of the big bang experience condensation along with expansion? Could this duality be compatible with the cosmological principle of isotropy and homogeneity?

Hello all, I have a water cooled PC and am about to install a thermoelectric cooling device which can easily cool the water to near freezing temperatures. The cooling blocks are manufactured from copper and acrylic, and the hose is just a generic plastic hose. here's my question: how cold can...

I was reading today about superfluids and the like. They were talking about how at a certain low temperature bosons will all go into their ground state. I'm trying to get a physical feel for what this means. If a mole of helium 4 atoms(boson) are cooled so that condensation occurs. What...

hi guys, i have the following question to answer: a 40g copper calorimeter contains 200g of water at 20 degrees celsius, it asks how much stam must be condensed in order to achieve a final temperature of 50 degrees celsius. I was just wondering what formula to use?, and do i need to know the...

Earlier this week, I was reading this paper by Brown [of Brown and Bethe fame]. http://arxiv.org/abs/nucl-th/0504029 Title: Relation of Strangeness Nuggets to Strangeness Condensation and the Maximum Mass of Neutron Stars Authors: Gerald E. Brown, Chang-Hwan Lee, Mannque Rho It expands...

If we cool down a small sample of atoms and see bose-einstein condensation, and so the speed of the atoms is slowed down dramatically, what can we say about the speed of the sub-atomic particles (quarks etc..), do we know how their speed is being changed? regards, marcel

Can someone please help me with this question? Thanx Choose those statements that are correct about the following two condensation polymers: (A) Prepared from ethylene glycol and terephthalic acid and (B) Prepared from glycerol (CH2OHCHOHCH2OH) and terephthalic acid Both...

Condensation reactions occur between the OH and H of C 1,4 and 6 to form polysaccharides - why do we not get reaction at C 2 or 3? ( 5 is obvious since it is not attached to H or OH ) Thanks. :smile:

Hello friends, I am planning to do one new instance of benzoin condensation, with pyridine-4-carboxaldehyde as the carbonyl compound to receive, 2-hydroxy-1,2-dipyridin-4-ylethanone, the resultant benzoin compound. However I have some doubts as suggested in this website, since pyridine...

Question about "Condensation of Space" Uhm hi! I was listening to Dr. Kaku on Coast to Coast Sunday, and had a question about something he mentioned, namely that he thought that strings were formed from the condensation of space. I was wondering, and forgive if this is a silly question...

I used to race with a club called NSRA (www.nsraracing.com) that runs winged sprint cars on asphalt tracks. Every once in a while, especially on the larger tracks and in colder weather, you'd see little condensation vortices (plural vortex) behind the tips of the wings. Even less often one could...

Hey guys! I was wondering how physics is inlvolved in the forming of condensation trails or contrails.

How is superfluidity studied in a BEC?

I grasp the idea. The only thing I don't get, is why do the atoms have to be frozen? How does the lack of heat effect the state of which the atoms are in? And once the state of superfluidity is achieved, why must the liquid not have a viscosity? Paden Roder wanderingand asking aimlessly to...

Chi Meson offline Joined: Aug 2003 Location: Posts: 40 [1.08 /day] Member #: 1431 This might be jumping the topic, but...Other areas: The proof of Bose-Einstein condensate. Old theory, but refined physics? Isn't this "evolution"?... how is bose einstein condensation explained...