Cloud Definition and 256 Threads

I'm trying to do a cloud chamber, but I think they are all too common and simple. It's just a box. I've thought about doing in a bottle, but it is just too weird, and is not original. Any other ideas or hints?

Greetings all, I finally made a cloud chamber using an old aquarium and dry ice. Now, I got the expected result to happen, with a fine mist falling from the top like snow, but didn't see a single particle track. Any ideas why this might be? I have some guesses, but wanted someone with...

Homework Statement To solve this problem you will need to construct a differential equation. A picture of the situation will help. Ignore all gravitational forces. A Rocket ship of structural mass M and fuel mass m, begins at rest relative to a gas cloud. The ship burns fuel at the rate ω which...

My setup: plastic box (~1l) with the cover painted black mat the bottom of the box covered with sponges saturated with ethyl alcohol (90%) to the limit (all over sponge capacity poured back to bottle) turned upside down and placed on ~0.5kg of dry ice. I can see a 'rain' of particles of...

So I'm studying scattering and size parameters now, I've come to understand that the sky is blue because the size parameter is such that it's an excellent "scatterer" of blue-violet visible light, and horrible at red-orange, that let's pass, and such the sun is yellow within the Earth. I've also...

Yesterday I decided to carry out a cloud chamber experiment for a school assessment. I used "100%" isopropanol and around 2.5 kg of dry ice. After a wait of approximately 30 minutes, the particle tracks began to appear. I placed a weak source of Americium-241 sourced from a smoke detector (1...

Hello all! Firstly, thanks for reading this post! I am a high school student attempting to make a basic, dry ice cloud chamber. I have made several cloud chamber designs and I am about to start making it. However, before constructing the product I would appreciate some members to provide...

Hi! It has been explained to me in another thread of mine that there actually can be lightning/thunder within a cloud. My question now is how there can be such high charge gradients within a cloud that this can happen and of what types of ions and electrons there is and how they have emerged...

I know this has been suggested because of long period comets. Sort of a spherical asteroid belt at the very edge of where the Sun's gravity has any relevance. The inner asteroid belt, and the Kuiper belt though have many examples of objects which are proof that they exist. Is the Oort cloud any...

An electron beam can be curved into a loop using a magnetic field with flux lines at right angles to the electron beam. These electrons have a high kinetic energy leaving the electron gun. My question is how would a magnetic field effect motionless charged particles for example a cloud of...

Hello all, Another very idiotic question (sorry for the idiotic questions today). From what I learned, a perfect gas obbey pV=nRT because the gas molecules collide against each other in an amazingly elastic way; that is, they may collide a trillion times but will still keep their total kinetic...

With the growing threat of global warming, couldn't we launch a series of rockets into space filled with water and have them discharge the water to create clouds in space between the sun and earth? The water vapor cloud would absorb and deflect some of the heat. It wouldn't have to be very...

I recorded an amazing cloud chamber track tonight. It came from the direction of the sun, seemed like the angle was off slightly though. I was at 1200ft above sea level and it was 6 pm. I will attach a picture of my setup and a video that is typical and then the video with the awesome track. It...

Homework Statement Using a radio telescope we are recording data from the galactic plane at the 1420.4MHz frequency of neutral Hydrogen - we are aiming to create a polar map of the Hydrogen in the Milky Way. When looking through a cloud of Hydrogen (i.e. a spiral arm) the frequency observed can...

Today's APOD http://apod.nasa.gov/apod/ap160125.html Shows this fascinating table. What a pity that is doesn't show isotopes. Strange are Ba, La, Ce which are shown as large star but not supernova. The article says that the origin of Cu is not well known. Fascinating. I'm curious about the...

The proposed orbit of Planet Nine looks like it falls in a gap between the heliopause and the Oort cloud; could planet Nine have caused the gap? Would Planet Nine get most of it's energy (electro-magnetic) from extra solar sources, since it is outside the heliopause?

Homework Statement The rain cloud has an approximate volume of 6.50 mile3and an average height, top to bottom, of 350 ft.1 mile = 5280 ft. If a cylindrical container 6 ft in diameter collects 2 in. of water after the rain falls out of the cloud, estimate the total weight of rain that fell from...

A high intensity continuous wave laser passes through an electron cloud. Please discuss what would happen and in relative amounts. Thanks

In 2008, astronomers discovered that a multi-million-solar-mass cloud named Smith's Cloud would hit the Milky Way's disk in about 27 million years. Now new Hubble observations have identified the mysterious cloud's likely origin. Link: New Scientist

Homework Statement What is the Jean's length in parsecs for a typical neutral hydrogen cloud, which has a density of n(H I) ~10^8 atoms/(m^3) and a temperature of 100K? Homework Equations jean's length = sqrt[(15*K*T)/(4pi*G*u*p)] where: 'K' is the Boltzmann constant 'T' is the temperature of...

Hi. I am doing some complex computations using c, c++, matlab, python. It is very slow on a conventional PC. I heard, there is a way to do scientific computations remotely. Such that I could sort of get an access to the remote advanced PC, and perform computation remotely there. And then...

Why isn't the Oort Cloud shaped like a disk like the asteroid belts and how the planets orbit? Also, why exactly do the planets orbit in that flat disk shape?

The setting strongly require rather unimpressive processors and not high enough demand to create multiple processors. On the other hand there would be clearly a big need for computation power. The solution that I can think of is going simple. In case of devices requiring little computation power...

Hey, Lately I'm noticing my laptop is getting old. As I don't have money to buy a new one I figured I'd recycle an old(er) desktop PC. My plan is to use it for running more intensive programs on this machine. Does anybody have some information regarding this? I'm using openSuse linux already...

So perhaps I'm not the only one here on PF who's heard about this .That said, besides the gas cloud G2 concealing a low-mass star, I cannot help but wonder what azimuthal angle G2 made its closest approach to the supermassive black hole Sagittarius A*. The reason this is relevant is because...

First, may I apologize in advance if this question is in the wrong section of the forums. Given a cloud of mixed gasses and rocky material, how is spin created when a star is born? I will also give the cloud of gas a random order of movement prior to star formation. Can the physics for the...

Hey all, I'm hoping this is in the right section. Basically I'm interested in creating a laser point cloud, but can't think of the best shape to do it. E.G. shining a laser straight down through a median and having the light scattered into a lot more points. I'd than have a receiver to read...

Homework Statement After turnig of magnetic-optic pit, cold cloud of atom 87 Rb is expanding. Size of cloud after time t, is given with relation: where, k_B is Boltzman constant, m mass of 87 Rb. Draw a plot, then use least squares method to find temperature T, and initial size of cloud...

Hello and thanks for reading Homework Statement I'm in high school. I chose my yearly project in physics, and wanted to make a cloud chamber. The subject is "deflection of charged particles in a magnetic field", so I must set a magnet alongside the cloud chamber. I've prepared for it, bought...

I just saw an astronomy phenomenon with the following description: a) It was like a "cloud of stars" containing approximately 1.000 shiny objects b) It moved relatively fast (I compare the speed across the sky to the movement of an airplane that is so far away that you can hardly see it -at...

Eric E. Mamajek, Scott A. Barenfeld, Valentin D. Ivanov, Alexei Y. Kniazev, Petri Väisänen, Yuri Beletsky, Henri M. J. Boffin. THE CLOSEST KNOWN FLYBY OF A STAR TO THE SOLAR SYSTEM. The Astrophysical Journal, 2015; 800 (1): L17 DOI: 10.1088/2041-8205/800/1/L17 The Science Daily article...

I am going to report about Adiabatic process, specifically in cloud formation. Can someone help me some important points to consider?Im more concerned in cloud formation only since my topic is limited in that matter. 1. What is the science behind the adiabatic process in clouds? 2. Some...

I attended the navy day celebrations and the marine commandos demonstrated a bomb blast by setting a time bomb in a small installation at the middle of the sea. The commandos dived from their boat and set the explosives from underwater. After the explosion, what I saw first was a cloud of black...

Hello physicists, This is my first time on these forums, so I'm sorry if this isn't the right place. Feel free to move it if it isn't. I am building a small cloud chamber to detect particles resulting from the decay of pions in the atmosphere for a local science fair. I hope to see electron...

Can be black hole created straight from cloud forming protostar. I mean, the region which is collapsing is so massive that pressure of radiation could not resist and the cloud is collapsing to singularity? If not, why?

Hello, Imagine a spherical chamber and a concentric spherical plasma confined within. We eject electrons at a constant rate from the chamber walls into the plasma. As the electron cloud approaches to the plasma, since it does not have electric field inside, nothing happens to the plasma. When...

Hi, I wanted to ask, what does the density of a hydrogen cloud in space depend upon? That might be a silly question given the definition of density, but here's the context; Considering a particle at rest within a molecular cloud at radius r from the centre, I have shown that the acceleration...

No, it is not! Actually it is something to do with the scalar wave equation. Let us assume that a solution of the scalar wave equation ( Ω ) is a steady state with amplitude ψ and the oscillating factor exp(-tω), Ω=ψ(r)exp(-itω(r)). Usually the frequency ω assumed to be a constant. Now, suppose...

So I was looking up what causes thunderstorms online and found this: "As hail moves within the cloud it picks up a negative charge by rubbing against smaller positively charged ice crystals. A negative charge forms at the base of the cloud where the hail collects, while the lighter ice crystals...

Why do atoms repel each other when their electrons aren't in any defined region of space? If we think of the electron as completely smeared out over the whole volume of the orbital, is the electric field just distributed evenly and continuously across it? Or do electrons always have a definite...

Homework Statement Hi everyone, This is a conceptual question, so there are no variables, per se. I'm trying to figure out how to calculate the velocity at which methane would rise into the atmosphere when released on the ground. Density of air: 1.225kg/m^3 Density of methane: 0.717kg/m^3...

Specifically in Carl D Anderson's cloud chamber experiment, the first experiment to prove the existence of the positron, a positron travels through all of these mediums: glass, charged liquid particles, water vapor, and lastly passes through a lead plate. If antimatter is suppose to anihilate...

Any book recommendations for Cloud Physics?

I know cloud computer has been around in some form for a good deal of time but all the sudden it is taking off. People are deeming it the future of computing, why is this? what does cloud computing mean for the future of computers and storage et cetera. Thank you

A (Wilson) Cloud Chamber can show the tracks of ionized particles passing through it, typically emanating from outside the chamber and attributed to cosmic rays (more accurately described as cosmic particles). The chamber itself has one or more transparent surfaces, most commonly glass, through...

Hello: I would like to include a diagram for my presentation showing a thermionic cloud. I've looked on the computer for something to get me started and have come to a dead end. Does anyone know where I can look to get some ideas of what a thermionic cloud looks like? My understanding is...

Hello, I never tried any cloud solution, and I hardly know what it means. Thanks to the CodeProject newsletter, I read this article comparing the performances of different cloud solutions: http://www.infoworld.com/print/237169 from this reading, I guessed that the cloud might be used...

Homework Statement Consider a simplified model of cloud formation. Hot air in contact with the earth’s surface contains water vapor. This air rises convectively till the water vapor content reaches its saturation pressure. When this happens, the water vapor starts condensing and droplets are...

Has anyone here ever done this experiment? A buddy of mine and I were thinking of setting this up but we had a few questions first. Is it better to use pure isopropyl or pure ethyl alcohol? I have read both from different sources. To conduct this more than once, do you just have to replace...

Disclaimer: I'm not a physicist I've never quite grasped interstellar gas clouds (i.e. the material for new stars) and how they work. If they were too sparse, then you'd expect them to just dissipate. If they were too dense, then you'd expect them to collapse spontaneously. But yet they seem...