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 Subject: Pressing question Category: Science > Astronomy Asked by: shugd31085-ga List Price: \$2.00 Posted: 15 Jan 2006 14:08 PST Expires: 14 Feb 2006 14:08 PST Question ID: 433736
 ```What speed would a bag containing an average sized faeces have to be travelling, in open space, to be capable of cleanly removing a human head ( including space helmet)?```
 There is no answer at this time.

 Subject: Re: Pressing question From: eliteskillsdotcom-ga on 15 Jan 2006 14:37 PST
 ```ehhgh.............. like a flee hitting a large rock. i hate people.```
 Subject: Re: Pressing question From: qed100-ga on 15 Jan 2006 15:21 PST
 ```The energy of the cohesive force holding the system together at the neck is E. So you'll need an impact of energy > E, to guarantee both severance and separation. Kinetic energy is E = mv^2/2. 2E = mv^2 2E/m = v^2 sqrt(2E/m) = v So the speed of your crap must be greater than v. My guess is you'll have no problem if you eat a high fiber diet.```
 Subject: Re: Pressing question From: shugd31085-ga on 17 Jan 2006 04:28 PST
 ```cheers for the input qed100, but i'm looking for actual figures, need to get my moneys worth you know. Can't the average wieght of a dump be found on the net? You forgot 2 take into account the helmet. eliteskillsdotcom since the shit would be frozedn solid in space i think it would have a little more impact than " a flee hitting a large rock " u twat. Just so you know, people hate you too```
 Subject: Re: Pressing question From: qed100-ga on 17 Jan 2006 05:32 PST
 ```Hi, The problem isn't the mass of a lump of poop. It's finding data on the shear/tensile strength of a typical human neck. Also the space helmet will depend on what suit design one is considering; there are and have been a number of them. Incidentally, I didn't exactly neglect the helmet in my (admittedly) meaningless) calculation; I simply called everything the "system". :)```
 Subject: Re: Pressing question From: azdoug-ga on 28 Jan 2006 08:16 PST
 ```Well, one of my average logs is probably 0.5 lb. And then the little rabbit-turds that follow are probably 0.1 lb... (I hate those little guys...) However, a large portion of the mass comes from water. In space, the water would be gone, right? Wouldn't it turn to ice immediately and then sublime into gas? I may be wrong... ANYWAY, I'm guessing your log would lose about 50% or 60% of it's mass when it instantly dries out and freezes. Then, you have to decide whether to assume the log slowly dropped out of 'Uranus', or whether it was something like explosive diarhea, where the speed could be more like 10-20 mph. Either way, those speeds are pretty slow. For a 0.25 lb loaf, I'm guessing it would have to travel somewhere around 750 - 1000 mph in order to sever the head and helmet...```