Smoke Definition and 100 Threads

Hi all, I'm trying to answer the following questions related to a project on smoke rings. We are in an introductory class, so this project is more for fun and just applying the little we have learned about point, rigid body, and fluid motion to something less understood like vortex rings...

Hi all, I'm trying to answer the following questions related to a project on smoke rings. We are in an introductory class, so this project is more for fun and just applying the little we have learned about point, rigid body, and fluid motion to something less understood like vortex rings...

wiring in smoke detector...?... Hello Forum, simple question about wiring in a house smoke detector. It operates at 120 V. Two wires, the black (hot) and white (neutral) are enough. There is a 3rd wire, red, to interconnect multiple alarms: if one rings all the others ring too... The...

I have a few questions: 1. 'small smoke particles in air are seen under a low magnification microscope to move randomly at a speed of 0.10mm/s. The speed of sound in air is 330m/s. Estimate the mass of the smoke particles. I cannot make the link between speed of particle and speed of sound -...

"smoke" ring with only air? Can "smoke" ring be blown with only air (withouth smoke) in cold?

strange laptop smoke :( Ive got an acer aspire 5536 laptop never had a problem with it, a couple of days ago my partner turned the laptop on and saw smoke coming from where the charger was plugged in so she unplugged it turned it off and shouted me, so i plug the charger back in and the power...

I'll give you all something to be skeptical about, because secondhand smoke is bogus. Where did the assumption of secondhand smoke start? http://www.epa.gov/smokefree/pubs/strsfs.html The EPA went to court for this "study" because they downright lied and wrongfully claimed that...

Take a look at these videos: Smoke rings in air: http://www.swisseduc.ch/stromboli/etna/etna00/etna0005video2-it.html?id=14 Air rings in water: http://www.youtube.com/watch?v=bT-fctr32pE&feature=related Second one is really amazing, as it shows two things: - great stability of the ring, which...

Why does smoke from a campfire look blue against trees near the ground but yellow against the sky?

Okay, I'm at work and I get a phone call from my daughter. Our smoke detector had gone off for no apparent reason. Unfortunately, it is the type that runs off of house current and the only way to turn it off is to turn the breaker off. However, that breaker also supplies power to the whole...

What do you make of the following explanation regarding the movement of smoke: Let's assume there is no gravitational force from the outside.

Anyone who can tell me the corelation between Hartridge Smoke Unit (HSU) and FILTER SMOKE NUMBER(FSN) as I have the two systems giving one in HSU and the other in FSN.I would like to compare the result given by the two SYSTEM

Nooooo! The battery in the one in my bedroom must be getting low because it has started making a very loud chirp ever couple of minutes and there is no smoke. OMG, if this continues, how do I take it apart? I see a button in the middle of it, will that kill it?

Most smoke detectors contain an isotope of Americium (241Am), the nuclei of which decay by emitting an alpha particle. When a nucleus of Americium emits an alpha particle the principle of conservation of momentum and the principle of conservation of energy are obeyed. Show that the ratio (KE...

I fly model jets that utilize miniature gas turbine engines. If one wishes to introduce a smoke system, A smoke oil tank is installed on board, The smoke oil fluid is then pumped from the tank to a spray nozzle located at the exhaust outlet of the turbine (thrust nozzle). The smoke oil is then...

how smoke travals at 70mph or dose it? i have a ? that has been nagging at the back of my head for some time something i noticed for example a car traveling 70mph down a interstate all windows rolled up the passenger is smokeing he blows the smoke out of his mouth and the smoke floats freely...

Not looking for much of a discussion, just a simple answer. Did Feynman smoke cigarettes?

Does anyone know why you can see the smoke coming from dry ice? Is it actually CO2? It does not make sense to me, why could I see CO2 evaporating, but I cannot see it normally? Is it the moisture in the air that I can see reacting with the cold CO2?

I am working of the Diesel Emission Project, however i have some problem in evaluating the filtraion power of the Particulate Remover Unit. The following is my question: What is Hartridge Smoke Unit (HSU) ? Could anyone can provide some picture of different level of HSU so that I can...

The little round battery operated one's, has anyone found one that doe's not sound off at the slightest whiff from the cooker, i mean i have one in my living room that is yards away from the cooker and that sounds off with no visible smoke about, even the one upstairs has gone off a few times...

Homework Statement Would the Mg : O ratio be affected if some magnesium oxide smoke escaped during the reaction of Mg with oxygen gas? Please explain with a sample calculation. Thanks.Homework Equations I know that the empirical formula is MgO.The Attempt at a Solution I don't understand how...

Hi All, I work in a bio research lab. We are trying to set up a smoke exposure chamber to expose mice to low levels of cigarette smoke. In the contraption we have, a cigarette is burned in a small chamber and the smoke is pumped into the mouse exposure chamber. In my tests so far, the...

I was going to have baked potatoes for lunch so i put them in the oven on high, half an hour later the houses filled with smoke, it is still lingering now, what ever had spilled over in the oven previously must have burnt and burnt and burnt, strange as the last thing i baked did not cause any...

How worried should I be that I smoke about 10 cigarettes a day? I'm 24, and only want to live to about 60 or so. Will I seriously die ealier from smoking? Hope this thread is allowed: as I know it's not an "in-depth" medical discussion.

Hey guys, so for my extended essay in physics i hav came up with a topic that required me to build a wind tunel. I already have that, but then now i need to make smoke or sumthing to pass through the wind tunnel to show the wind patterns and variations. Any ideas in how to create sumthing...

In 1975 I've got the job in lab constructing middle power one mode CO2 lasers for outer space object location (they used C and O isotopes for reducing losses in atmosfere). The main joke for newbies of our lab's boss (Yuri Vasilievich Pechenin) was to breathe sigarette smoke from mouth into...

First i thought that smoke used to rise upwards due to a 'projection' created by a chimney.. but lately when I was looking at an essence stick.. the smoke could literally go anywhere. Even the same with a burning piece of coal. Even the smoke generated at the bottom part of the coal 'envelopes'...

The other day I was looking up the beareau of "Alcohol, Tobbaacco, and Firearms".. ROFLMAO3! and well... When I was in Taipei they had some really great cig brands, Dunhill (Brittish) and Seven Stars (Japanese), but they are about the strength of Reds, and switching between brands ****ed my...

Homework Statement Using a microscope, smoke particles can be seen moving inside a glass tube. They appear as tiny spots of light that move in various directions. The air molecules inside the glass tube cannot be seen with the aid of the microscope. a) State why a microscope is needed to...

Homework Statement A smoke detector has a 92% chance of functioning properly. If there are 3 of these, what are the chances at least one of them will go off during a fire? Homework Equations Standard binomial distribution I believe. X~B(n, p) The Attempt at a Solution P(X>=1) =...

Hi everybody, I know some of my friends use candles when they smoke in a room saying that it can get rid of the cigarette odor. Can you explain it by physics (or chemistry). I really do not know if this topic is suitable in here. Thanks

Everyone's been in a house or motel room and smelled the residue of tar from cigarettes that stays in walls, carpet and ducts from previous smokers. The important question is does it pose a hazard to health? How much, if at all, does the threat diminish with time?

Don't worry, man. You won't get hassled by the pigs.:biggrin: http://www.azcentral.com/offbeat/articles/0622wst-pot-resolution22-ON.html

I can why fire would give off gasses. In particular if one is burning CH4 there would be a lot of gaseous CO2 and H2O. Why, when I burn wood, does a fine particulate matter get kicked up into the air? Why does it not fall to the ground like ordinary solid matter? Is there a lot of frictional...

I was talking to a friend the other day and they were telling me about some smoke chamber device. Apparently a 10 gallon chamber can be filled with smoke and some kind of "ray" would pass through the chamber and carve out a path in the smoke. Does anyone know anything about this? Do you...

this is what I did: I attached a hose to an empty plastic bottle, sealed it with plastic paste and put a cork in it. When i turned the water on the pressure started builiding up. What I noticed was that when it reaches about 2 bar it gets a lot hotter. I don't know why, do you? When the cork...

Okay, this came up as an aside in the thread about the outdoor smoking ban, and it just struck me that maybe the division in understanding between smokers and non-smokers is that we experience second-hand smoke differently prior to any first experience/opportunity to experience smoking...

What keeps coming out of this for me is that the Bush admin claims that Congress was kept informed, and that this qualified as Congressional oversight. However, since those same members were sworn to secrecy, they would be committing treason should they act to disclose, hence act on any of that...

hi, me and my friends all help each other with physics, and we've been tolk that in our test next year there will be somthing on senseors so we thought a little project wold further our knowledge! So i think I am going to do one on comparing Photoelectric smokealarm sensors to ionization...

The Other Day I Was Sitin In A Bar Looking At My Freinds Smoking , They Tried And Tried To Blow A Smoke Ring But Could'nt ,it Ws Agreed That Its Not Possible To Create Smoke Rings At Will ,its A Flash In The Pan , But I Differed ,surely Their Must Be Some Condition For Creating A Smoke Ring ,i...

My mother and I go shopping every now and then in my car. I don't allow smoking in my car since I'm not a smoker myself. My mother doesn't seem to mind sitting on a bench or a picnic table outside the store in warm weather but winter is another story. I don't like to force her to smoke outside...

Is there away tio reduce the smoke produced in a [combustion] reaction? Theoretically, there is no smoke produced at all (only water and carbon dioxide), but because of the impurities, imcomplete combustion, moisture, obviously, smoke is a common product of burning something. How can I...

Hey, before I get started, I know this is a forum for serious chemists and not punk ass kids who want to screw around, but oh well. I tried the 6 part potassium nitrate and 4 part sugar smoke bomb and I was greatly disappointed. I have used those pre-manufactered smoke bombs that use about a...

I'm sitting here choking and coughing. All the windows and doors are wide open and a thick cloud of smoke is wafting out and contributing about .3 degrees to global warming. Looking back at the cause of all the smoke makes me think I should have seen it coming. I'll tell you what I did and you...

Could it be a delayed chemical reaction that creates a feeling of fear and anxiety in the smoker ? My theory is different in that rather than blame nicotine dependency as the cause for continual smoking, it is only a small part of the whole smoking process. I believe it is a delayed chemical...

I just noticed my new $10 smoke detector contains a few microcuries or less of radioactive Americium. Anyone one knows how these work? Why this element? It's the first time I see an application for it.

If you were near someone that was smoking Marjuana, and you inhaled the smoke but dident smoke it, then would it get in your system?... like say you were sitting in the same car as them. The reason I'm asking is because I'm going for a blood test soon, and i need to know. Also, how long does it...

..we recently got a smoke detector installed by the city. It seems to have some kind of an identity crisis.. it goes off every time we take a shower Sure, at least we regularly get the confirmation its still working not really my idea of practicality though..

Hi all, maybe this is not the proper forum to post this. Because it rather belongs into a section 'strange effects in everyday life', or whatever. Well. Yesterday I opened a bag of peanuts. The ones that have the closed shells which contain two nuts each. I found the best way to crack them...

second hand smoke? Riddle me this... You know all the "stop smoking" or "truth" adds? Most people are claiming that second hand smoke is more harmfull than first hand. Do you think this is a true statement? Why do you think this is? Is it a chemical reaction that happends in your...