Things you always wanted to know the answer to [Vol. 2]
Discussion
I would like to know what happens to smells. For instance, small, smelly room, close the door, leave it for a few hours, the smell has gone. Where did it go? Did it condense out of the air and fall as smell pores to the ground? Did the molecules of pong break down into their component parts? Did it soak into the walls? What happened to it?
This is an important question.
This is an important question.
When you smell something, it's because there are molecules of some sort in your nose and those molecules I suppose are often heavier than air so will gradually sink, perhaps if you sniff closer to the floor the smell will still be there?
I'm sure to some extent they're all volatile compounds so probably they do break down into less volatile things and I guess things that aren't volatile don't smell so much, as smelling things is a chemical reaction.
and yes, when you smell poo, that's poo molecules in your nose.
Now, what I want to know is if lighting a match really helps with the smell?
I'm sure to some extent they're all volatile compounds so probably they do break down into less volatile things and I guess things that aren't volatile don't smell so much, as smelling things is a chemical reaction.
and yes, when you smell poo, that's poo molecules in your nose.
Now, what I want to know is if lighting a match really helps with the smell?
scarble said:
When you smell something, it's because there are molecules of some sort in your nose and those molecules I suppose are often heavier than air so will gradually sink, perhaps if you sniff closer to the floor the smell will still be there?
I'm sure to some extent they're all volatile compounds so probably they do break down into less volatile things and I guess things that aren't volatile don't smell so much, as smelling things is a chemical reaction.
and yes, when you smell poo, that's poo molecules in your nose.
Now, what I want to know is if lighting a match really helps with the smell?
Yes, once the blue flame dies down.I'm sure to some extent they're all volatile compounds so probably they do break down into less volatile things and I guess things that aren't volatile don't smell so much, as smelling things is a chemical reaction.
and yes, when you smell poo, that's poo molecules in your nose.
Now, what I want to know is if lighting a match really helps with the smell?
Ayahuasca said:
Power leads for laptops, cameras, phones, etc...
What is the short little black cylindrical barrel thing that is often wrapped around the thin bit of the lead?
Ferrite BeadsWhat is the short little black cylindrical barrel thing that is often wrapped around the thin bit of the lead?
Edited by grumbledoak on Monday 20th October 07:56
monthefish said:
P-Jay said:
Anyway, if you wanted to piss the staff off into turning the pump on quicker you could replace the nozzle a few times, but it used to cause havoc with the tills recording 'nil sales'.
Might have to try that...P-Jay said:
All changed now, most 'pay at pump' pumps are open all night in an otherwise unmanned station - I guess they just rely on ANPR and CCTV to ensure the money is safe, as for stopping a suicidal lunatic from using the pump as some terrible, admittedly very short range, flame thrower not much use!
How short is "short range"? Was Point Break accurate do you think?
Some are sold on in the UK, many are sent overseas. It's quite big business too http://www.rctuxfordexports.com/m/ is based in Nottingham and the owner has done very, very well from it.
Just watching a vid on the 'tube which details the build process of the UK's latest nuclear powered sub, "Astute". Apparently, it doesn't use active sonar (i.e. it doesn't send out "pings") but passive sonar :
kitty fk is that possible?!?
documentary said:
The passive sonar "listens" to the sea, and can detect a ship leaving port in New York whilst at berth in Southampton
How the fkitty fk is that possible?!?I er.. I second that question!
It's basically just a really really really really good microphone (or hydrophone if you prefer), so it'll pick up all kinds of noise from everywhere and technically all of that noise, if it's above a certain very low threshold is technically detected, it seems a bit of a stretch for any noise to get that far and still be at a detectable level but sound travels further under water and whales communicate over ridiculous distances, so if it can get that far, the challenge is in then picking it out from all the other noise, all the closer ships and other sea like noises.. like um.. whales talking and uh.. seaweed swishing in the.. currents.
Perhaps what they actually mean is that once they were able to isolate a noise similar to prop noise or engine noise and on the right bearing from all the other noise which correlated with a known departure of a ship from NY? It's much easier to find something if you know when and where to look for it.
Or maybe it's complete BS as documentaries often are
Surely there is an sonarist somewhere on PH who can explain this?
It's basically just a really really really really good microphone (or hydrophone if you prefer), so it'll pick up all kinds of noise from everywhere and technically all of that noise, if it's above a certain very low threshold is technically detected, it seems a bit of a stretch for any noise to get that far and still be at a detectable level but sound travels further under water and whales communicate over ridiculous distances, so if it can get that far, the challenge is in then picking it out from all the other noise, all the closer ships and other sea like noises.. like um.. whales talking and uh.. seaweed swishing in the.. currents.
Perhaps what they actually mean is that once they were able to isolate a noise similar to prop noise or engine noise and on the right bearing from all the other noise which correlated with a known departure of a ship from NY? It's much easier to find something if you know when and where to look for it.
Or maybe it's complete BS as documentaries often are
Surely there is an sonarist somewhere on PH who can explain this?
vournikas said:
How the fkitty fk is that possible?!?
Whilst it can probably detect (i.e "hear") it it probably can't do much with that information due to the natural factors involved. Salinity, thermal currents, other noise so on and so on. But, is there really any use to being able to hear that far if you can't take any action. I dare say they're able to reliably detect and monitor things a reasonable distance past maximum weapons range.kitty fk is that possible?!?Gassing Station | The Lounge | Top of Page | What's New | My Stuff