what determines whether a fart smells or not?
374202
its the methane in ur farts that make them stink the rest (about 99%) is just air (think about what it would smell like if it was 2% methane)
103283
If you want more smelling farts, you have to include in your diet food containing amounts of Hydrogen Sulfide and Sulfur.  The more rich in Sulfur your diet is, more of those gases are going to be produced by the bacteria in the intestine, and  more smelly they will be your farts.\n\nFoods like onion, and eggs, are remarkable to produce stinking farts. On the other hand, for example, beans, produces great amounts of farts, although not necessarily smelly. Sorry aboyt my english... Enjoy your farts!
399265
i don't know, i've never been in this situation.  my boss and i frequently have farting contests because we are both so gassy.  i walk into his large office and rip a nice one and let it hang there for a while, at least until i can smell it, then i just leave.  then he saunters into my cube and rips a nice one, let's it linger, and then just leaves.  i'm not sure what the score of our battle is, but i've got to be beating him.  his toots come out little and whimpy, and although mine pass through my sphincter somewhat wet, they are always large and billowy.
533784
Farts are not a single molecule.  In fact, they are primarily aerosolized feces.  The smaller molecules that are a byproduct of digestion often become gaseous in the intestinal tract and are expelled as farts.\n\nThere are far too many possible compounds in farts to list them, but a popular one to talk about is methane.  Only 1/5th (or so?) of humans produce methane in their farts, a flammable molecule that doesn't smell particularly good.\n\nhere is a page with a similar but more detailed answer:\nhttp://www.heptune.com/farts.html
1151586
A profound point. I think this is the reason: when you narrow the neck of a balloon when you let the air out, it makes a sort of farting sound. If the air inside this balloon smelled, it wouldn't smell as bad letting it out this way since only a little of it comes out at a time. However, if there's a huge opening in the balloon, all the air comes out at once, releasing all the smelly air into the world.
48658
Yes, smells have weight, or mass. When you smell something, your nose is detecting a few, a very few, molecules floating around in the air.
351442
try stretching and straining to cause a fart,once you have farted cup it in your hand and smell of it.
37894
FART means passing of intestinal gas from the anus\n\n\nIt is generated because to pass intestinal gas from the anus
207024
It depends on the permeation time of the smell (ie. dense gases spread faster in a closed environment than less condesed ones.)  Wind helps as well if it is an open environment.\n\nTo put it simply smell has too many variables to create a unified theory of odor permeation.\n\nBut I do know my farts seems to move fasters than other odors.
1072569
does masturbation have a smell.
425316
Either puppy breath.\nOr.\nThe smell of a guy's cologne... as long as it's not that cheap crap or he's smothered in it.
960210
They smell, even, before they pop. You would have to intercept them to find this out. . . . and, indeed, they do smell even after they pop (or is it poop?). \n\nThe only thing the water does is cool them down a bit. The temperature of a fart at inception is 98.6 degrees and maybe let a little diffuse into the water (but not much).\n\nAn interesting little fact is that when you detect odors you are actually getting a tiny bit of whatever you are smelling in your nose (hmmm?).\n\nGotta let this go now.
698730
Now this is what I call a proper question\nOf course everyone does, even posh people.\nI bet the Queen keeps a secret diary\nIn a few year time the Queen mothers diaries will reveal her grading of wartime farts (dried egg played havoc with the royal bowels I'm told by a reliable witness)\nThere's an old Icelandic saying that all men (and woman) love the smell of there own farts.\nMagnus Magnusson is never happier than when his large intestine is wreaking havoc.\nLets have more flatulence questions \nP.s. Heinz vegetable soup does it for me, only yesterday morning when I awoke the duvet was on the ceiling
1032604
What makes farts stink? \n\n\nThe odor of farts comes from small amounts of hydrogen sulfide gas and skatole in the mixture. These compounds contain sulfur. The more sulfur-rich your diet, the more sulfides and skatole will be produced by the bacteria in your guts, and the more your farts will stink. Foods such as cauliflower, eggs and meat are notorious for producing smelly farts, whereas beans produce large amounts of not particularly stinky farts.
1104937
Yes Boyles, law does apply to the farts. i will give an example analogous to farts. When gas is inside your body, it feels the pressure exerted by your body which is higher than the atmospheric pressure. When the gas is released the pressure decreases and its volume exapnds causing it to diffus across the room. If you fart with a high pressure then some sound is created. This is similar to If you fill a balloon with air and hold the top in such a way that you let only some air escape at a time then you hear sound. The reason for the sound is that gas is being passed through a small tube with high pressure.
962087
Smell the paper. A better question would be how do they know if they got fecal matter on their hand
481934
Most of the odour comes from molecules released by bacteria in the gut.  Some are facultative; they can live with or without oxygen.  Some of these release hydrogen disulfide (rotten egg gas.)\n\nOthers are anaerobes; they live only in the absence of oxygen.  Many of these release fatty acids and amines from the larger molecules they digest for food; fats, proteins, nucleic acid, etc.  Some fatty acids are very pungent; some smell like butter, or strong cheese, or dog faeces etc.\n\nThe anaerobes are even pungent if cultured in our laboratory!  When we are culturing from some samples, the stinky ones generally contain anaerobes.  A good sense of smell is very handy in Clinical Microbiology.\n\nYears ago, I read research (that was done in inbred mice strains) showing that the genes of the animal had an influence on the types of bacteria that remained in its gut.  They said this was part of the reason why different strains of mice could recognise close relatives by smell; genes resulted in smells.\n\nI think this explains why different people make different odours, though fed the same foods.