Water out of Tube?

Just run over to the, Drying a powder post.

There's a guy with a 70ºC oven there. Just put it in his oven for a while. He's drying some powder for homework.

Why won't reduced pressure work?

Blow dry compressed air through it.

Uh...how about a piece of SuperFloss? As an alternative, how does the plastic feel about acetone?

We care because we care.

If you don't care at least keep your miserable, bitter minded comments for yourself.

THIS IS WHERE I CALL OUT TO THE CR4 COMMUNITY ABOUT THE NEED OF A RATING FOR BAD ANSWERS.

Hi bigginthesky,

Firstly, as Members of this site/community we are not supposed to help with 'school' stuff. Read the rules or write to admin and ask, or read the FAQS perhaps, I cannot recall where I saw it so a while back asked admin about giving answers to school kids. It is 'Policy' NOT to give any help with any school work. That was from Moose.

Second, and to be pedantic, lynlynch asked a question, and did not make a statement. So strictly speaking with his words (I think it was) "why should we care". That can be read as he does not care, but taking the meaning of the words and sentence as a whole he is asking 'why do we care', which means he is not saying he does not care.

No offence is intended here OK?

What you have to remember is, that we often get the same band of kids, who find it easier, because they do not have to do research and any Math they have or should have already done in class, to ask a site like this and other similar sites the same question.

I have not done so in this case, but at other times I have put the question exactly as it was asked into google and got back 2, 3, 4, or more other sites which the question was left on.................... Saves doing homework right? Yes it does but, those kids will never learn anything so whatever they are learning, they will never be able to use it in real life.

It is really a case of 'being cruel to be kind'?

Take care

Hi bigginthesky,

I went back to my request to Moose on the 'Homework' request in general. He says and this is backed by Admin:

--------------------------------------------------------------------------------------

I'd suggest using this snippet from the CR4 site policy instead.

• Do your own homework. CR4 is not a homework cheat site. While some here might relish the opportunity to sharpen up old rusty skills by working the homework problem, consider this and consider it well. If you cheat on your homework by using someone else's answers, you are only cheating yourself, because the purpose of any homework or other college assignments is to help you learn - by practice, repetition, and self-discovery. (thanks STL Engineer)

Best,

Moose

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As well as the obove and the previous post I sent to you, why, if these are honest requests, do these people invariably read in as 'guest' rather than joining? Mmm, makes you wonder?

Take care.

I'm with you totally.

Just don't think it's fair when someone spoils the spirit of this community with their gnarly comments.

If one has nothing valid to share he should just keep his comments for himself.

Thanks for the clarification babybear. Appreciated.

Hi bigginthesky,

I am most grateful for your kind and positive reply, thank you.

I took the opportunity of posting the piece I got from Admin, and hopefully others will see and things will become a little clearer.

Take care.

BB,

I don't want to start an argument, but do want to speak to this matter since it arises fairly often. I am often sarcastic or (preferrably) arcane in my answers to inane questions or seemingly homework questions. I often also provide a clue to the answer and stick in a smiley. I don't care so much about the forum policy as I do that the poster learn how to do this him/herself. It is turning into a very flat, very competitive world out there and newbies had better get to work learning how to learn.

If you follow challenge questions, you may notice that Physicist, whom I greatly admire, has to, from time to time, tell me to shut up and knock off the pedantic nitpicking. I don't resent that and think more of him, rather than less, for calling me a jackass when I am one. Science and engineering are not for the thin-skinned.

That said, I am grateful to bigginthesky for reminding me to be a bit more civil (or at least to include a few more smileys). There is a perfectly great homework site

http://www.physicsforums.com/

and we might do better to refer questioners there.

Hello TVP45,

Really appreciate your post, thank you.

I do not think there is any danger of an 'argument', it is just a discussion forum dedicated to Engineering in all its forms, right?

I very rarely take any remark as an insult. In this case it seems we are pretty much on a par, as I agree wholeheartedly with what you say.

I found when I needed help at school or later on at work, that if I sorted out what I needed to know and or, learned how to do something, care study at a professional doing the same job I wanted to know more about. Like for instance working on a car or its engine, Gardening, and woodwork and in general, working with my hands, was picked up pretty fast as I was already interested in that subject, you know?

I bought a set of brand new Encyclopedias and learned from them the stuff which was not taught to me at school. I asked no one, I just studied and read and all of a sudden it would click in my head and I would understand. My nick name at work was "The Doc", as even the management asked me for my opinion and or advice all the time.

But, do not get me wrong, if advice was offered, mainly on the work side of things, rather than at school, I would listen and already knew just enough to figure if what was being said was BS or helpful. The irony is I know I got my last two jobs, 15 years at each and only left when the place shut down, because I would think things through before doing something, and I was far from a genius (still am!) but made my own sensible decisions.

A girl in my Dept of 20 mostly females, was always asking why when I asked if she could start such and such a job. "You always have an answer" she said, I said if I ask you to start a job there is a reason behind my request, such that the product had to be out on or before time, which for me was about a two week turn round, and it should be correctly made and packed as if it was a present for a friend. So yes I always had an answer because generally people do not do things 'work wise' because they love to but more because they have a product to get out with hopefully, if it is planned correctly, no holdups and no one getting hurt. Now this sound like BS but, if you ever run your own place you know you always had things going through your mind that others would never have thought about, right?

What I am getting at, is, that these people asking for help for a very often obvious school or study question, will never learn a thing and never be able to rely on their own judgement if they do not knuckle down and learn how to now. So what if they think the are being smart by asking this site and many times others as well for an answer, and so what that they cannot see the connection between what they are doing at school and any future Job they may get................... Everything they learn, and you can never get enough knowledge, will be useful at sometime in their life, it is just they do not realise it yet because they are not wise enough to.

Started getting a little heavy there, sorry.

I think it would be easier just to say in reply to your post "I agree"!

Take care my friend, and always feel free to ball me out or throw rose petals!

Careful bb there is rising sentiment that correcting someone on the basis that they are wrong or incorrect is controversial

Seriously this is a view of managing editors of a few supposed professional news agencies

Hi wire,

Behave.

It is also known as being honest and facilitates the discussion. At least I think it does, thats the first time I have used "facilitates" in a while so I could be wrong?

Take care my friend.

It was pure sarcasm bb

using second semester words doesn't impress me

replace the tube........

Flow pure alcohol through it. It absorbs water and will boil off at ATM pressures with just a little dry air pushed through it. You may need to repeat it several times. How long is the tube? Or find someone with a welder. They use purge gases. Flow through it for 10 minutes or so should clear all your water. Cap the ends to keep it dry. Low pressure works just as well as high pressure flow and doesnt waste gas.

If you want it really dry, follow the alcohol with ether. It will finish the job and evaporate almost instantly. Do this in a well ventilated area.

follow the alcohol with ether

yea and don't forget to turn off the vacuum cleaner

either

how about

not using gas or what not

it blows things up

put a vacuum cleaner on it

and suck out toilet paper, paper towel shredded, cotton balls

followed with foam 1 inch long

slightly bigger than the id of the pipe

attached to a string

and clean inside of pipe of toilet paper

with foam plug

then run your speaker wires thru your pipe

or run vac with hair blower on one end vac on other

let stand

for few chapters in homework

here is a thought

>> total effected area

here is another thought

>> define the problem

>> once you have defined the problem

>> you will have 50% of the soulation

oh yea

I am 60 years old

7 th grade education

and I teach all the trades

include autocad and lisp programing

I design 100 ft x 400 ft green house's

for total encapsalated biodiesel fuel alge reactors

and I can not spell

stop asking question's

and you stop learning

but think out of the box that you are in

look at things

mix them up

cross relate

read read read

and photograh the pictures in your mind

ok ether thru a pipe

I realy have a problem with that

how old are you

how much experiance in life you have

and do you have major medical coverage

and most of all

do you rent or are you in your parents house

think twice then think again

I am not going to bother to correct typing

I belive your going to school

and this is what it looks like when you do not study

english language

now apply that to electrical plumbing etc.

Hello Guest,

You say you have tried a vacuum method to remove the water.

I know from experience, you will have 'Capillary Reaction' in a tube this thin and the water will be loathe to leave the tube unless perhaps a very aggressive centrifugal force is applied from about halfway along, leaving two trailing 'leads'?

Bear this in mind, see the site below:

Surface TensionWater at 20°C has a surface tension of 72.8 dynes/cm compared to 22.3 for ... The surface tension of water is 72 dynes/cm at 25°C . It would take a force of ...hyperphysics.phy-astr.gsu.edu/Hbase/surten.html - Cached - Similar -

And why if you prefer not to wet are you using a wetting material??

http://en.wikipedia.org/wiki/Wetting

Difficult to advise without knowing which plastic it is. Most plastics are hydrophobic. If you keep it under vacuum at a temperature about 2/3rds the melting point of the plastic, it should dry. Is the tube open at both ends?

Smash the tube or burn it. It will definitely dry up.

Hey, you never said the tube had to be intact, you only said you needed it dry .