So I was brushing my teeth this morning and right when I had begun brushing I swallowed some of the toothpaste. It’s the ’3D Crest White System(with fluoride)’ and it clearly says to call poison control if more than a pea size is swallowed. The toothpaste I had swallowed was already foamy so I don’t think it could have been a pea sized worth all together. All I know is that fluoride is terrible if swallowed and that now I have a slight tummy ache. </3
any advice?
Thank you!




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What’s the pH of a solution of pH A, proportion P, and pH B, proportion 1-P? If it’s important, A is <7 and B is >7

Thanks




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I would be drinking water through the day , eating regularly and no lt eatin any junk food . Can I lose weight by doing that ?




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We had them come and repressurize the tank (with our own pump btw) and change the filters. Since then we got a bill for over 0. I am postponing paying it because I lost my job. Now the darn thing is leaking every time we turn it on. Its at the base by the slide switch. We can’t call them to fix it because of the outstanding bill. What can we do? Any fix-it-yourself websites out there anyone can recommend?
I will post a picture.
<a href="http://tinypic.com" target="_blank"><img src="http://i40.tinypic.com/1r3cl2.jpg" border="0" alt="Image and video hosting by TinyPic"></a>
Sorry the link didn’t post like I wanted.
Its a side sliding one.
Feel free to email me. Yahoo isn’t letting me post the correct link.




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I have a 28-gallon fresh water fish tank with 4 goldfish. How often should I change the water? Can you give me other tips so that the changin’ of the water is not too agressive for my fish? Thanks <><




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Ten Points for best Answer!
Okay, rain water, toilet water, Spring bottled water [Arrowhead], tap water, and school DRINKING water.
Information about their nitrate and nitrite for EACH of them, please <3
& BEST ANSWER GETS TEN POINTS~
[if you want, you can provide GOOD sites.]




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What is the function V = K * f(P) for a fluid flowing through a fixed-size orifice, where V is the delivered volume per unit of time, P is the fluid pressure, and K is a calibration constant? I can determine K from boundary-limit conditions on sample instances. A near-approximation function would suffice.

In my specific instance, 20 < P < 100 psi, and the fluid is water.

Thanks.

- John




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Can someone tell me the mechanisms involved in this process?

1g of a 1:1 mix of naphthalene and benzoic acid were dissolved in diethyl ether, then extracted using first NaOH, then water.

the separated liquids:
naphthalene in ether – mixed with anhydrous sodium sulfate and then filtered and dried; ended up with pure napthalene

NaOH extract containing benzoic acid – HCl added, chilled, then filtered to get pure benzoica cid crystals.
I’ve figured out the acid extraction half…still working on the Naphthalene though :)
oops it looks like I got an answer for the acid part just as I posted that last uupdate >_< thanks!!! Still working on the naphthalene + sodium sulfate part




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it seems such a waste. Is there anyone who offers cartridges which have screw off top or bottom so it can simply be refilled with fresh activated carbon? I can find 50 pouinds of activated carbon for like a dollar a pound. That would be about 1/20th the cost of buying a whole plastice cartridge every few months.
re: <<will it still be activated charcoal>>
Well it sat in the side of a mountain for a hundred millenium I would hope the carbon should age well sitting in a pastic bag in my closet. I mean how long do those store filters sit on the shelf before you come along and buy them? Are those still "activated" either? If anything should age pretty well I would hope it would be a charcoal rock.




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