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Design an experiment o determine the quantity of copper deposited at an electrode during electrolysis (link)
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Sounds like a fun task you have in front of you. See if this link may help you with designing "YOUR" experiment...
http://lmgtfy.com/?q=Design+an+experiment+to+determine+the+quantity+of+copper+deposited+at+an+electrode+during+electrolysis
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while my boyfriend was fingering me precum come out and got all over his pants ? he touch it and keep going ? (link)
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To answer your question of: “Could I get pregnant from precum?”
CONTRARY TO "LOL xox’s" brilliant and informative answer of “NO” to your question which is of course totally INCORRECT.
A female CAN become pregnant by a mans pre-ejaculate(pre-cum)if the following conditions are Met:
A. The per-ejaculate has motile sperm
B. The per-ejaculate in anyway is deposited into a females vagina during ovulation.
Remember it ONLY TAKES ONE SPERM TO FERTILIZE an egg..
And you can fit over 11,000 sperm on the head of a sewing pin.
While technically the answer to your question is YES it would be highly unlikely for you to become pregnant from the incidental contact you described.
Not IMPOSSIBLE but highly improbable.
Read the following to better understand your question and help you with determining your pregnancy risk. which is akin to getting struck by lightning on a sunny day..
http://en.wikipedia.org/wiki/Pre_ejaculate
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