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perfect and crystal
Max Planck's strong form of the third law of thermodynamics states the entropy of a perfect crystal vanishes at absolute zero.
The implication is that the entropy of a perfect crystal simply approaches a constant value.
# The entropy of a perfect crystal at 0 kelvins is zero
An ideal crystal has every atom in a perfect, exactly repeating pattern.
For example, a perfect crystal of diamond would only contain carbon atoms, but a real crystal might perhaps contain a few boron atoms as well.
* Vacancy defects are lattice sites which would be occupied in a perfect crystal, but are vacant.
Such a crystal can be referred to as a perfect mirror.
The manufacture of a perfect crystal of a material is currently physically impossible.
In single crystal form, silicon is an almost perfect Hookean material, meaning that when it is flexed there is virtually no hysteresis and hence almost no energy dissipation.
A perfect crystal is one that contains no point, linear, or planar imperfections.
The hypothetical concept of a perfect crystal is important in the basic formulation of the laws of thermodynamics.
In crystallography, the phrase ' perfect crystal ' can be used to mean " no line or planar defects ", as it is difficult to measure small quantities of point defects in an otherwise defect-free crystal.
A perfect crystal lattice, with low enough thermal motion and no deviations from periodic structure, would have no resistivity, but a real metal has crystallographic defects, impurities, multiple isotopes, and thermal motion of the atoms.
High-resolution transmission electron microscopy and in situ measurements reveal that the welds are nearly perfect, with the same crystal orientation, strength and electrical conductivity as the rest of the nanowire.
The annual average amount of sunshine ranges from about 30 % in the winter, but in July and August the average rises to the 80's, as crystal clear days may linger well in fall for perfect golf and boating weather.
Gandhi also recognised Gokhale as an admirable leader and master politician, describing him as ' pure as crystal, gentle as a lamb, brave as a lion and chivalrous to a fault and the most perfect man in the political field '.
Sphalerite crystallizes in the isometric crystal system and possesses perfect dodecahedral cleavage.
Because of the lack of impurities in the leftover regions which solidify, the boule can grow as a perfect single crystal if a seed crystal is placed at the base to initiate a chosen direction of crystal growth.
His breakthrough came when he realized that instead of attempting to grow a large single crystal of a polarizing substance, he could manufacture a film with millions of micron-sized polarizing crystals that were coaxed into perfect alignment with each other.
However, this presupposes that the material forms a ' perfect crystal ' without any frozen in entropy ( defects, dislocations ), which is never completely true because crystals always grow at a finite temperature.

perfect and is
And it is expressed, at least to their taste, in a perfect form.
Admirably written, it is a perfect introduction to Swedish history for readers of other countries.
By virtue of his self-reliance, his individualism and his freedom from external restraint, the private eye is a perfect embodiment of the middle class conception of liberty, which amounts to doing what you please and let the devil take the hindmost.
Now what is perfect motion??
Thus, circular motion is itself one of the essential characteristics of completely perfect celestial existence.
I assume that the number of readers of this anthology who regard themselves as morally perfect is small, and that most readers are willing to consider procedures by which they may gain more insight into themselves and better understanding of others.
Here is truly a `` Great Recording of the Century '', and its greatness is by no means diminished by the fact that it is not quite perfect.
Yet you feel the orchestra is near at hand, and the individual instruments have the same firm presence associated with listening from a good seat in an acoustically perfect hall.
Probably no location for a pool is perfect on all counts.
The way in which it transports its pollen is not so perfect, either.
Second, if there is ever a perfect time to pull the rug out from under him, it's on maneuvers.
Its rotunda forms a perfect circle whose diameter is equal to the height from the floor to the ceiling.
It is hard, on the other hand, to blame the policeman, blank, good-natured, thoughtless, and insuperably innocent, for being such a perfect representative of the people he serves.
This acquisition is a matched, perfect set -- consisting of two sofas six feet long, plus six sidechairs and two armchairs.
Looking unto God, the Prophet Isaiah wrote these blessed words almost three thousand years ago: `` Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee ''.
That is almost a perfect description of the predicament in which we find ourselves today, isn't it??
Mr. Foy is a joy, having learned his dancing by practicing it until he is practically perfect.
Being a dimensionless fraction, it may also be expressed as a percentage, and is measured on a scale from zero for no reflecting power of a perfectly black surface, to 1 for perfect reflection of a white surface.
Algerian music is a perfect reflection of the cultural diversity that characterizes the country, music directories are distinguished by a profusion of several styles.
Therefore the perfect of these verbs would be ich bin gesessen, ich bin gelegen and ich bin geschlafen respectively ( note: ich bin geschlafen is a very rare form, usually you will hear ich habe geschlafen ; but ich bin eingeschlafen fell asleep is quite normal ).
In the variant of German that is spoken in Germany, the words stehen ( to stand ) and gestehen ( to confess ) are identical in the present perfect: habe gestanden.

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