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Opposites Attract; – Well, Yeah but not always. September 27, 2013

Posted by regan222 in Books, General Ranting, Religion.
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Picture if you will…You’re at the lake, floating on an inflatable raft in the cool azure blue. A light breeze tickles your wet skin as you look up to the spotless blue perfection above. As you look down you notice a tiny invader in your serenity. A small insect purposefully striding across the surface of the water toward you. How can this be? Has the insect messiah come to deliver his people to the promised land? I’m gonna say “pro’lly not”.

gerris02The picture to the left is a common Water Strider.  This little miracle operates by Physics and Chemistry rather than by supernatural support, however, they all come from the same source and were created by the same designer so it really doesn’t matter.  What’s important is how the chemistry works in the natural and how the analogy can apply to the supernatural.

Notice in the picture that the insect’s legs do NOT displace any water at all.  If you look closely at the tips of the legs in contact with the surface of the water you will see that the water surface appears to distort where the legs touch, almost as if the insect were walking on a thin film of plastic wrap.  A boat, floating on the water, would sit lower and actually displace a portion of the water.  That is, after all, the definition of floating.

An object floats only if it is buoyant in the substance in which it rests.  Buoyancy is defined as…
“the upward force on a body immersed or partly immersed in a fluid” (http://www.askdefine.com)

The object is supported by the amount of water it displaces because the water produces an upward force as the object sinks in.  If the mass of the object is less than the mass of the volume of water displaced, the object will float.  All of this is not relevant, however, because the object in question, the insect, does NOT float.

Just as on that long ago Sea of Galilee, this little insect is actually walking ON and not floating IN the water.  His mass is very small and the long legs spread the weight out over a large enough surface area that he is able to walk on the surface of the water just as on solid ground.  He does not sink in or displace any water.  He does not depend on buoyancy.  He does depend, however, on the unique chemistry and physics of the water molecule.

Water is composed of one Oxygen atom in a covalent bond with two Hydrogen atoms.  The Hydrogen atoms are composed of a single proton and a single electron.  A covalent bond is one in which the atoms SHARE the electrons.  As you may know,  electrons orbit the nuclei of atoms. The outer set of electrons, called the valence electrons, are used by the atom to bond with other atoms to form molecules.  A covalent bond occurs when the outer electrons orbiting a nucleus begin to spend time orbiting the nucleus of another nearby atom.  When that occurs, a new compound is formed and the chemical properties of the original molecules are changed.  In our case, two gasses bind together to form a liquid with some pretty amazing properties.

The Oxygen atom has many more electrons orbiting its nucleus than do the Hydrogen atoms.  The two electrons from the Hydrogen atoms begin to orbit, sharing time between the Hydrogen atoms and the Oxygen atom.  At any given time there are more electrons around the Oxygen end of the molecule than there are at the Hydrogen end.  This gives the Oxygen end a tendency towards a negative charge.  This results in the Hydrogen end (composed of basically two protons) a tendency towards a positive charge.  When a molecule has a partial positive charge at one end and a partial negative charge at the other, we say that the molecule is “polar”.  It has poles like a magnet.  This condition is the source of all of water’s peculiar properties and it is what gives our little friend the ability to duplicate what only one man has ever accomplished.  (Well actually two managed it but only one was really successful.  The other…well lets just say that he walked further on water than either you or I are ever likely to.)

The arrangement of water as a polar molecule has exactly the effect that you would suspect.  The positive and negative areas are attracted to the corresponding negative and positive regions of the water molecules surrounding it.  Water molecules act like tiny magnets.  This albeit weak, attraction between polar molecules is called Hydrogen Bonding.  It does some very strange things to water.  One of the most unusual is the property of cohesion.  Water molecules tend to stick to each other.

If you have ever waxed a car and then driven into a rain storm you have seen water “bead up” on the hood.  Water forms droplets of considerable size because the molecules are attracted to and hold onto each other with surprising tenacity.  An excellent way to see this for yourself is the following experiment…

You will need a penny, an eyedropper, a bottle of water, and a bottle of some organic solvent (acetone – nail polish remover, or alcohol (90% isopropyl, not that cheap Wal-Mart mix) will work.  Start with the water and see how many drops you can drop on the penny before the puddle you are creating breaks and runs off.  Now try the same with the NON-POLAR solvent.  Having done this experiment many times over with my students from year to year I can verify that it is possible to drop over 100 drops of water onto the surface of a penny before it runs off.  With alcohol you might get 30 or 40 and with acetone, even less.  The non-polar liquids lack cohesion.  The molecules are neutral and not attracted to each other.  In short, those liquids have no SURFACE TENSION.  If you waxed a car and then ran off into an alcohol shower you would find that the liquid would not form beads.  Also the miraculous little creature above would sink helplessly beneath the waves of a lake of acetone, never to rise again.  The liquid would not support him, not because he was too heavy but because he did not have a surface of molecules holding on to each other, to support him.  The boiling point of water, its ability to gather and hold heat, the fact that liquid water is more dense than frozen water, as well as this little guy’s ability to stand on the surface supported only by surface tension; all these unusual behaviors are properties of water’s unique chemical and physical makeup.

“Why”, you ask, “do we REALLY need a lesson in the chemistry of water?”  Perhaps not, but we MIGHT be able to draw some insight from an analogy on the way water behaves.  It is said that opposites attract and indeed, the positive and negative parts of each water molecule do attract each other, but the result is that every water molecule, and each is identical to the others, is attracted to its neighbor.  They have the same nature and so they are attracted to each other; not what you might expect.  As Christians, we have indwelling each of us, the same nature.

“For who hath known the mind of the Lord, that he may instruct him? but we have the mind of Christ.” (1 Cor. 2:16)

The nature of Jesus Christ is in each and every Christian.  Something in all Christians resonates at the same frequency and THIS force or effect is what pulls us together in His service.

“And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart,” (Acts 2:46)

Like the early disciples, we, if we allow Christ to indwell us fully, are held together by His nature.  Because of this attraction we can be more than the sum of our parts.  Just as water boils at a much higher temperature than it should, the Christian can show incredible patience through the most trying of times.  As a thin stream of water will bend away from an oppositely charged object, so the committed Christian can overcome a temptation or obstacle that he or she would, in their own strength, be destroyed by.

Perhaps there is a lesson to be learned here. Sometimes, opposites repel and similar things attract.  However, in order to experience this power you must partake of the nature of the source.  Allow Christ free rein in your life and you will find an incredible source of strength.  You might even walk on water.

 

 

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Comments»

1. Laurel Scales - September 28, 2013

In the words of a very wise person, “Peter and James and John were in the boat and Peter had to get out and walk. But he didn’t down because Jesus scooped him up and chunked him back in the boat. It’s wonderful to know that if we hold him close enough He will always get us back to the boat.


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