what does polarity mean?
825775
With respect to covalent bonds, polarity refers to the tendency of electrons to move towards one of the atoms.  Polarity in covalent bonds arises from differences in electronegativity between the participating elements.  For example, the covalent bond in a molecule of water, H2O, is polar.  Oxygen is more electronegative than hydrogen, so the end of the molecule containing the oxygen atom has a partial negative charge.
517387
I'm going to asume that those viatmins aren't polar, which explains why they dissolve in fats, which are also non-polar.  Likes dissolve in likes.  Polarrity has to to with the electrons being drawn to one side of a molecule, causing a slight charge on each side.  Water is polar, and will pull apart other polar molecules, but non-polar vitamins A, D, and E won't disolve in water, but instead in fats and oils.
228873
A dipole (Greek: di(s) = double and polos = pivot) is a pair of electric charges or magnetic poles of equal magnitude but opposite polarity (opposite electronic charges), separated by some, usually small, distance. Dipoles can be characterized by their dipole moment, a vector quantity with a magnitude equal to the product of the charge or magnetic strength of one of the poles and the distance separating the two poles. The direction of the dipole moment corresponds, for electric dipoles, to the direction from the negative to the positive charge. For magnetic dipoles, the dipole moment points from the magnetic south to the magnetic north pole — confusingly, the "north" and "south" convention for magnetic dipoles is the opposite of that used to describe the Earth's geographic and magnetic poles, so that the Earth's geomagnetic north pole is the south pole of its dipole moment. Because of the absence of magnetic monopoles, magnetic dipoles are actually created by current loops or by quantum-mechanical spin.
1149182
In electrodynamics, polarization (also spelled polarisation) is the property of electromagnetic waves such as light, which describes the direction of their transverse electric field. More generally, the polarization of a transverse wave describes the direction of oscillation, in the plane perpendicular to the direction of travel. Longitudinal waves such as sound waves do not exhibit polarization, because for these waves the direction of oscillation is along the direction of travel.
546448
this polar nature depends on electronegativity. \nIn a bond, say C-H, the most EN element gets partial -ve charge and less EN element gets partial +ve charge\nIn C-H, H is less EN and C is more EN. Thus, C gets partial +ve charge and H gets partial -ve charge.\n\nEN of C is 2.550 EN of H is 2.200\nEN of Si is 1.9 EN of Sn is 1.96\n\nIn this group EN of C is high and H is less in C-H thus, C-H is most polar. \n\nAs EN of Si and Sn is less, than H , H gets positive charge but very less +ve charge. but in C-H C is more EN and gets +ve 2.550.\nHope i was clear enough.\nAny doubts you can ask further.
165927
Positive and Negative ends of a molecule depend upon the electornegativity of the atoms of the molecule. Lets take a simple example of water here. H2O. \n\nOxygen is water is bound to 2 Hydrogen atoms. Oxygen is highly electronegative. So, it pulls the electrons in the O - H bond towards itself partially. So, this creates a partial negative charge on it and also a partial positive charge on Hydrongen.\n\nElectronegativity actually means "the ability of an atom to pull a lone pair of electrons towards itself". Electronegativity depends on the number of electrons present in the outermost shell. \nEx: Sodium has 1 electron in the outermost shell. So, its tenedecy to release this electron and get to a stabler configuration is more than gaining electrons further. But, in case of Chlorine, there are 7 electrons. It needs just 1 more electron to attain stable configuration. So, Chlorine tends to pull electrons towards it and therefore Chlorine is highly electronegative. \n\nNow, looking at the molecules u have given...\nNitrogen is highly electronegative. It has 3 unpaired electrons in its outermost shell, but it wud still go ahead and grab a few more to get to a fully filled state. So, in NH3, N would be partially negative and H would be partially positive. \n\nSo, is the case in HCN too. Cyanide ion (CN-) is a highly electronegative ion and therefore acts as the negative end. \n\n\nHope this information helps.
944997
you divide or multiply by a negative numberand the sign of inequality flips
390810
No. I'm polar.In fact, I'm bipolar. I'm sorry I can't tell you anything about it, but maybe the link below can.\n\nI hope this is helpful. Good luck.\n\nSincerely,\nTerry
632488
CHANGE!\n\nAny kind of change, whether positive or negative, is a source of stress (good stress is called eustress, bad stress is called distress).\n\nIt's true!
771892
It means:\n"Not bad. Although sometimes I don't know how I am doing. I'm feeling lost".\n\nMaybe she confused numbers and this message was not ment for you, hm.
768242
it means that as a (linear) transformation from the plane to the plane it reverses the orientation.\nthe way we calculate the area, is really a signed area, in the sense that it takes into consideration the orientation of the 2 vectors.\nit is a bit subtle and that is why most teachers do not really explain it.\n'
640388
It's not positive...It means that you are hard to get along with. It's constructive, though. The person who told you this probably wants you to know so that you can work on improving yourself.
632865
It means that the results of someones attitude or actions are causes conflict in a related situation.
254912
To neutralize is to make even or compatible....\nThe subject it refers to is the most important part of the word. Kind of like being a little sick/ Cancer? or a cold.\nGet it?
899426
the way i like to look at is... in a given molecule, you usually have one or two (maybe three) central atoms.  for example, in CH3OH, the carbon is your central atom.  in C2H5Cl, two two carbons are your central atoms.\n\nnow, taking a look at the central atom, see if it is bonded to identical atoms an all sides.  For example, if the carbons are bonded to four idental atoms, then it is non-polar.  if the carbons are bonded to different atoms, then it is polar.\n\nIf you take a look at CH4,  there are dipole moments between the bond  between the carbon and hydrogen, but the molecule as whole is considered non-polar because the carbon is bonded to four identical atoms.  \n\nhope that helps.
589096
Polar molecules, such as water molecules, have a weak, partial negative charge at one region of the molecule (the oxygen atom in water) and a partial positive charge elsewhere (the hydrogen atoms in water). \n\nThus when water molecules are close together, their positive and negative regions are attracted to the oppositely-charged regions of nearby molecules. The force of attraction is called a hydrogen bond.
723475
The reason polarity matters in an electrolytic capacitor is because the dielectric(the insulator between the two conducting plates) was manufactured by passing a direct current to a metal plate immersed in an electrolytic solution.   If you feed a current in the opposite direction through the capacitor, you'll destroy the dielectric.   If it's a large current the capacitor will explode.   Other types of capacitor can handle current in either direction.