Member of the Month

KilaTsunami
October, 2024

Online

Welcome to the Newschoolers forums! You may read the forums as a guest, however you must be a registered member to post. Register to become a member today!

Physics Bitch

profile picture
Colorbrahbro
Posts: 190 - Karma: -27
Rub a plastic comb through your hair then hold it near a thin stream of water and watch the magic.
Feb 11 2014 9:19PM
180 95
profile picture
GayWolf420
Posts: 37393 - Karma: 120,187
herd if you stick ur weiner In a vacuum it's like being with a girl
Feb 13 2014 4:19PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
Oh man gonna have to consult my 6th grade teacher on this one
Feb 13 2014 4:30PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
I did this now I can fit tennis balls in my foreskin
Feb 13 2014 4:31PM
0 0
profile picture
chicken
Posts: 6843 - Karma: 2,123
seriously. explain it then instead of being a dick.

your sixth grade teacher will probably tell you that opposite charges exert an attractive force on each other. However as we are dealing with electrically neutral molecules. So why is there an attractive force here?

you can't just say "polarization". I can memorize a bunch of fancy words as well, but it doesn't mean I understand what is going on.
Feb 13 2014 5:21PM
0 0
profile picture
Wallisch_pl
Posts: 5260 - Karma: 1,022
i want to punch this bitch in the face
\
Feb 13 2014 5:30PM
0 0
profile picture
chicken
Posts: 6843 - Karma: 2,123
this video can't be correct though, because we know that the charges are not free to move across the width of the water stream, which is many many molecules thick. They charges are bound to the water molecules. This is not free charge like in a metal.
Feb 13 2014 5:50PM
0 0
profile picture
CaptainObvious.
Posts: 5712 - Karma: 20,638
I have a raging boner for OP.


Like.....it's painful.
Feb 13 2014 5:53PM
1 0
profile picture
SFB
Posts: 8895 - Karma: 26,352
me 3
Feb 13 2014 5:55PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
I don't really see where you're coming from. Are you trying to say that nobody knows why the water is attracted?

If my sixth grade teacher told me that she wouldn't be wrong. There is an electrical attraction between the comb and the water. The H2O molecules may be electrically neutral but the individual atoms aren't; Hydrogen is slightly poisitve and the Oxygen slightly negative. This results in polarization (do you need me to define this term too?) of the H2O molecule and thus becomes attracted or repelled to charged objects.


I feel like your whole post is just bait trying to get me to say something wrong so please enlighten me
Feb 13 2014 5:56PM
0 0
profile picture
chicken
Posts: 6843 - Karma: 2,123
no I agree with you up to this point. I just don't like how you jump from polarization to saying that they will repel or attract charged objects.

why does this happen?

The original guy took something that is very cool, and makes people think about physics, and was just like "what are you in 8th grade?", as if this was a phenomenon that is ridiculously simple to explain. You did the same thing. Telling me that I should consult a 6th grade teacher.

yet no one has explained to me yet why the polar molecules will be attracted to the comb. Saying "because they are polar" is not a good explanation. It's just something that people have told you. I don't need you to define what a polar molecule is, but I do want you to tell me why there is an attractive force between the water molecules and the comb.
Feb 13 2014 6:07PM
0 0
profile picture
chicken
Posts: 6843 - Karma: 2,123
it's not bait to get you to say something wrong.

I'm just saying it's ok to be stoked on things that have a simple explanation, and sometimes the explanation might not be as simple as we think.
Feb 13 2014 6:10PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
You're acting like electric attraction isn't a thing. I get what you're getting at and I like how you encourage questioning rather than accepting but it doesn't really work here. It really is as simple as "opposite charges attract".


Are you looking for an explanation as to why opposite charges attract? That would be a great question that I cannot answer.
Feb 13 2014 6:18PM
0 0
profile picture
Miomo
Posts: 4302 - Karma: 14,133
Probably in an attempt to lower entropy. The two cancel each other out.
Feb 13 2014 6:23PM
0 0
profile picture
chicken
Posts: 6843 - Karma: 2,123
But why doesn't the attraction of the protons balance the repulsion of the oxygen?

PS. I don't think anyone can explain why charges attract each other, as far as I know that's just the way things are.
Feb 13 2014 6:24PM
0 0
profile picture
Colorbrahbro
Posts: 190 - Karma: -27
You guys are rediculous lol
Feb 13 2014 6:26PM
0 1
profile picture
DIX~
Posts: 4695 - Karma: 6,502
Lol. Okay well in that case: why does an attempt to lower entropy cancel each other out?
Feb 13 2014 6:30PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
Don't really follow. If you simplify the water molecule into a line, there will be a higher concentration of electrons on one side than the other if you bring a charged object near it. Sorry but I don't understand your question
Feb 13 2014 6:32PM
0 0
profile picture
Miomo
Posts: 4302 - Karma: 14,133
Well, they don't cancel each other out, but they inversely effect each other.
Honestly, I really don't know. I'm interested in quantum physics and whatnot, but I don't really have half a clue when it comes to any of it. I also can't find one same answer in a quick google, soo...
Feb 13 2014 6:38PM
0 0
profile picture
Miomo
Posts: 4302 - Karma: 14,133
There's actually an uneven distribution of electrons regardless of what's near it. Water's shaped like an L, with hydrogen atoms on each of the ends, and the oxygen at the bend. Oxygen is more electronegative than Hydrogen, meaning it pulls on the electrons more. Because of this, the electrons spend more time around the oxygen meaning the oxygen-side has a more negative charge, and the hydrogen-side has a more positive charge
Feb 13 2014 6:43PM
0 0
profile picture
howlongcanausern
Posts: 4982 - Karma: 1,737
Click for larger image
Feb 13 2014 6:46PM
1 1
profile picture
DIX~
Posts: 4695 - Karma: 6,502
"If you simplify the water molecule into a line..."


And water molecules aren't actually shaped like an L, they just teach you that to simplify things
Feb 13 2014 6:50PM
0 0
profile picture
chicken
Posts: 6843 - Karma: 2,123
yeah. I guess we can simplify the water molecule into a dipole. Also at the scales we are dealing with, we can assume that the electric field of the comb is more or less homogenous in the region of the dipoles, and the dipoles are pure dipoles (the comb is really wide, the distance to the stream is small, and the molecules are very tiny.

Thus there should be no net force on the dipoles right?
Feb 13 2014 7:42PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
we can assume that the electric field of the comb is more or less homogenous in the region of the dipoles.

Yes


the dipoles are pure dipoles (the comb is really wide, the distance to the stream is small, and the molecules are very tiny.

Eh... Pure dipoles? Don't think we can assume that here. What are you implying with these size classifications


Thus there should be no net force on the dipoles right?

Why?


As long as the water molecules' charges can move at all and the comb is charged, there will be an attractive electric force between the comb and the water.
Feb 13 2014 8:20PM
0 0
profile picture
japanada
Posts: 13784 - Karma: 1,957
Isnt grade 8 about 12 years old anyways?
Feb 13 2014 8:23PM
1 1
profile picture
chicken
Posts: 6843 - Karma: 2,123
even if it was not a pure dipole, there would clearly be no net force on the dipole in a uniform electric field.
Feb 13 2014 8:35PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
"clearly"

Okay you win, water isn't attracted to charged combs


Feb 13 2014 8:38PM
0 0
profile picture
Miomo
Posts: 4302 - Karma: 14,133
Oh sorry bro, the angle is 104.45 degrees. How could I be sooooooooo stupid. Man, maybe I need to go back to elementary school.
Feb 13 2014 8:45PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
Yeah, that's totally what I meant man
Feb 13 2014 8:54PM
0 0
profile picture
chicken
Posts: 6843 - Karma: 2,123
it is.

but it's not because a uniform electric field exerts a net force on an electric dipole. because it doesn't . clearly.
Feb 13 2014 9:14PM
0 0
profile picture
DIX~
Posts: 4695 - Karma: 6,502
y
Feb 13 2014 11:15PM
0 0
profile picture
SFB
Posts: 8895 - Karma: 26,352
this thread RULEZZ!!!
Feb 13 2014 11:18PM
0 0
profile picture
Negro_Jesus
Posts: 1789 - Karma: 91
False. The most magnificent bad ass animal on this planet is in fact the platypus.
Click for larger image
Feb 13 2014 11:40PM
0 0
All times are Eastern (-5)