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Science questions? Ask them here!

All non-spudgun related discussion goes here such as projects, theories, serious questions, etc. All "off-topic" posts (aka useless posting, determined by moderators) will be removed.
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Science questions? Ask them here!

Unread postAuthor: Pilgrimman » Sun Jul 29, 2007 6:42 pm

This thread is, as the name implies, dedicated to any questions about spudguns that people have. The only condition is that it is science related, and not something like "Where do I buy X?" or "How do you tap threads?".
Questions can, however, be situation-specific, such as "I plan to make a duel ignition system. Where would be the best spot to place the electrodes for maximum pre-ejection combustion?"
I will answer any questions I can, and try to provide links. However, by no means is this thread only for questions. Anyone who can answer the questions, preferably with links, is welcome to (i.e. most of the mods here, because of their experience). Know this, however: I am a high school senior, and have no college education as of yet. As such, I am not omnipotent, and can't answer everything. (Of course, we all know that college makes you omnipotent, don't we?) :D :lol: :D Also, I have only built one combustion gun before, and no hybrids. Therefore, it is probably best that people with at least some build experience answer questions related to that.

Thoughts are welcome! :D
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Unread postAuthor: iPaintball » Sun Jul 29, 2007 7:07 pm

This isn't really posted in the right place.
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Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
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Unread postAuthor: Gepard » Sun Jul 29, 2007 7:24 pm

I got a question......What's the point?

It is far easier to seek out info when searching by topic title that posts in a thread......

Michael
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Unread postAuthor: hi » Sun Jul 29, 2007 7:35 pm

i got another one-

why is water so freakin' wet?
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: mopherman » Sun Jul 29, 2007 8:56 pm

how do they get the co2 into the bottles?
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searching for a modern day savior from another place,inclined toward charity,everyone's begging for an answer,without regard to validity,the searching never ends,it goes on and on for eternity
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Unread postAuthor: Fnord » Sun Jul 29, 2007 9:16 pm

Hi: It would be very annoying to drink if it was dry.
Wouldn't it?
I guess you could try drinking ice or steam though.

Morpherman:
Well, for the big 9oz and stuff it should be kind of obvious. Kind of like refilling a lighter.
For the 12 gram ones, I can't remember exactly how the whole system of filling and crimping on the burst disk works. I know the discovery channel did an episode of "how it's made" that explained how they do it.


Also, since this thread is slightly pointless(being there is a search function), it would be interesting to turn it into a "general" science question discussion.
Such as:
If objects gain mass exponentially as they are accelerated to/near the speed of light, why isn't light incomprehensibly heavy?
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Unread postAuthor: Scotty » Sun Jul 29, 2007 9:46 pm

Where DO i buy "X"?
Also i am having trouble tapping threads, can you help?
Hi- They should really call it weter!

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Unread postAuthor: frankrede » Sun Jul 29, 2007 9:58 pm

Whats 2+2x2?
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Unread postAuthor: Modderxtrordanare » Sun Jul 29, 2007 10:55 pm

_Fnord wrote:Hi: It would be very annoying to drink if it was dry.
Wouldn't it?
I guess you could try drinking ice or steam though.


Wouldn't that be eating and inhaling respectively then? As one doesn't drink a solid or gas.

hi wrote:i got another one-

why is water so freakin' wet?


Water isn't wet per say, it is only our perception that makes us describe it as "wet." Dunk your hand into a vessel of water (sink, tub, pool, etc) and don't move it, not even one millimeter. Does it feel "wet?" We feel wetness due to the water (or any fluid for that matter, hopefully not mercury though :wink:) moving over the nerve endings of our skin.

Pilgrimman wrote:Where do I buy X?


Isn't that against the rules? :wink: Kidding.

Pilgrimman wrote:I plan to make a duel ignition system. Where would be the best spot to place the electrodes for maximum pre-ejection combustion?


Inside the ignition chamber would be best.

frankrede wrote:Whats 2+2x2?


2+(2*2) would be 6
(2+2)*2 would be 8


My question:
Find the functions f, g, u, and v such that:
c(p) = f(x)*g(h+p) + u(x)*v(w+p)

where h and w are defined by the definite integrals (D):
h(x) = D[0..x](f(x)dx)
w(x) = D[0..x](u(x)dx)

and c is a function of p, but a constant in x, i.e:
dc/dp != 0
dc/dx = 0

The functions f, g, u, and v each have the following properties:
* Continuous, real, and non-infinite.
* Non-zero, i.e. always positive or always negative.
* All functions are harmonic with the same period, a, i.e.:
f(x) = f(x+n*a), g(x) = g(x+n*a)
u(x) = u(x+n*a), v(x) = v(x+n*a)
where n is an integer.

Must see work, an answer only won't cut it.
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Unread postAuthor: wannabie » Sun Jul 29, 2007 11:17 pm

Modderxtrordanare wrote:
My question:
Find the functions f, g, u, and v such that:
c(p) = f(x)*g(h+p) + u(x)*v(w+p)

where h and w are defined by the definite integrals (D):
h(x) = D[0..x](f(x)dx)
w(x) = D[0..x](u(x)dx)

and c is a function of p, but a constant in x, i.e:
dc/dp != 0
dc/dx = 0

The functions f, g, u, and v each have the following properties:
* Continuous, real, and non-infinite.
* Non-zero, i.e. always positive or always negative.
* All functions are harmonic with the same period, a, i.e.:
f(x) = f(x+n*a), g(x) = g(x+n*a)
u(x) = u(x+n*a), v(x) = v(x+n*a)
where n is an integer.

Must see work, an answer only won't cut it.


dude... is that you homework? lol

and to the question i have no idea :oops:
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Unread postAuthor: Modderxtrordanare » Sun Jul 29, 2007 11:18 pm

Im not in school, it's summer.

Edit: I'm hopefully going to be enrolled in some community college courses, because I am lazy so I failed history. I hate history. I passed Chemistry and Algebra II with top marks though. Normally people hate Chemistry, Algebra, and classes that are "hard" like that, I'm the opposite, I prefer math/science over history/english. History already happened and I see no need in "*learning" it and I've been speaking the English language for a good decade.

*see "Memorizing."
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Last edited by Modderxtrordanare on Mon Jul 30, 2007 2:33 am, edited 1 time in total.
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Unread postAuthor: wannabie » Sun Jul 29, 2007 11:25 pm

oh yeah thats right your in america.... damn i wish it was holidays here :(

oh oh i got a question... why is the sky blue ?
lol i did know the answer to that question but i forgot :lol:
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Unread postAuthor: paaiyan » Sun Jul 29, 2007 11:29 pm

Modderxtrordanare wrote:Im not in school, it's summer.


Well I have classes. How kind of you to rub it in... Jerk.

But really, I hate college.

Science is good though. The sky, though. It's blue because your momma choked you as a baby and your face turned blue, but all the blue pretty much faded away after a while, except in your eyes. S you can always remember the blue sky is a reminder of how you were abused as a child. But really I think it has something to do wiht the way our eyes perceive the refracted wavelengths of the un as they pass through the atmosphere, that's also why the sunset it such pretty colors. The angle of the entering light waves change and therefore they are refracted differently and so you perceive different colors.
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Unread postAuthor: hi » Mon Jul 30, 2007 12:03 am

reply to 12 gram co2-

i think that they fill the cartrage and while it's pressureized the have a machine that puts a cap on it and crimps it shut, same way the close soda cans.

basicly a machine inside of a co2 compressor. at least i think thats how they do it.

ps- note the words "i think".
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: Marco321 » Mon Jul 30, 2007 1:31 am

My question:
Find the functions f, g, u, and v such that:
c(p) = f(x)*g(h+p) + u(x)*v(w+p)

where h and w are defined by the definite integrals (D):
h(x) = D[0..x](f(x)dx)
w(x) = D[0..x](u(x)dx)

and c is a function of p, but a constant in x, i.e:
dc/dp != 0
dc/dx = 0

The functions f, g, u, and v each have the following properties:
* Continuous, real, and non-infinite.
* Non-zero, i.e. always positive or always negative.
* All functions are harmonic with the same period, a, i.e.:
f(x) = f(x+n*a), g(x) = g(x+n*a)
u(x) = u(x+n*a), v(x) = v(x+n*a)
where n is an integer.

Must see work, an answer only won't cut it.


I could do that, i just don't feel like it :P + we haven't studied harmonic motion at school.

Also, since this thread is slightly pointless(being there is a search function), it would be interesting to turn it into a "general" science question discussion.
Such as:
If objects gain mass exponentially as they are accelerated to/near the speed of light, why isn't light incomprehensibly heavy?


I would imagine since light travels in quanta, which is packets of energy, and since energy in the form of light doesn't weigh anything, then mass cant increase because it has none. But thats just a stab in the dark.

EDIT: I thought mass increased by the mass dilation formula, not by an exponent...
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