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At and constant
At the opposite extreme, a transformation of a thermodynamic system can be considered isothermal if it is slow enough so that the system's temperature remains constant by heat exchange with the outside.
At first a gnostic Valentinian and Marcionist, Ambrose, through Origen's teaching, eventually rejected this theology and became Origen's constant companion, and was ordained deacon.
At the contrary, Zagreb-Split trait construction enjoyed a constant support from Croatian public and its on-schedule completion was marked with enormous joy and pride all through the country.
At this point Adams began to experiment with electronic music, and his experiences are reflected in the writing of Phrygian Gates ( 1977 – 78 ), in which the constant shifting between modules in Lydian mode and Phrygian mode refers to activating electronic gates rather than architectural ones.
" At the age of 8, he had been sexually molested by a camp counselor, who had also taken nude pictures of him .... Poor Mike had spent his whole life racked with guilt and in constant fear that these pictures would someday surface in a way that might embarrass him and, especially, his adoptive father.
The pure number we call the fine structure constant and denote by α is a combination of the electron charge, e, the speed of light, c, and Planck's constant, h. At first we might be tempted to think that a world in which the speed of light was slower would be a different world.
At low temperatures, it varies instead as e < sup >− α / T </ sup > for some constant, α.
At the same time, diseases, especially typhus were a constant danger to the encamped armies outside the fortress, and often forced a premature retreat.
At pressures below the triple point ( as in outer space ), solid ice when heated at constant pressure is converted directly into water vapour in a process known as sublimation.
At temperatures just below the triple point, compression at constant temperature transforms water vapor first to solid and then to liquid.
At the Curie point temperature, the dielectric constant drops sufficiently to allow the formation of potential barriers at the grain boundaries, and the resistance increases sharply.
At the bottom of the recession, 2003, it was 42. 4 trillion bolivares ( in constant 1998 bolivares ).
At a constant temperature, throughput is proportional to the number of molecules being pumped per unit time, and therefore to the mass flow rate of the pump.
At Vossenack, the 112th ′ s 2nd Battalion disintegrated after constant shelling and fled a German attack.
At constant energy intake, triglyceride levels are positively correlated with trans fat intake and strongly inversely correlated with omega-3 intake.
At constant pressure the above relationship produces a Maxwell relation that links the change in open cell voltage with temperature T ( a measurable quantity ) to the change in entropy S when charge is passed isothermally and isobarically.
At present ( 2006 CODATA recommended value ), the precision of the value of the Avogadro constant is limited by the uncertainty in the value of the Planck constant ( relative standard uncertainty of 5 × 10 < sup >− 8 </ sup >).
At room temperature ( 25 ° C ), RT / F may be treated like a constant and replaced by 25. 693 mV for cells.
At first the Thebans feared facing the Spartans head on, but the conflict gave them much practice and training, and they " had their spirits roused and their bodies thoroughly inured to hardships, and gained experience and courage from their constant struggles ".
At various points in the town are memorials of the constant wars between Percys and Scots in which so many Percys spent the greater part of their lives.
At the time, the Schuylkill Valley was a hotly contested property, with constant conflicts over titles and rights.
At optical frequencies, in semiconductors the dielectric constant exhibits structure related to the band structure of the solid.

At and temperature
Allotropes of iron, ( alpha iron and gamma iron ) showing the differences in atomic arrangement. At a certain temperature, ( usually between and ), the base metal of steel ( iron ) undergoes a change in the arrangement of the atoms in its crystal matrix, called allotropy.
At Montgomery, in the central region, the average annual temperature is 66 ° F ( 19 ° C ), with a winter average of 49 ° F ( 9 ° C ), and a summer average of 81 ° F ( 27 ° C ).
At its maximum, the temperature of the spacecraft's heat shield was between.
Carnrick ( 1981 ), The stabilized temperature platform furnace, At.
At room temperature and pressure, barium has a body-centered cubic structure, with a barium – barium distance of 503 picometers, expanding with heating at a rate of approximately 1. 8 /° C.
At that temperature, the vapor pressure of the liquid becomes sufficient to overcome atmospheric pressure and allow bubbles of vapor to form inside the bulk of the liquid.
At standard temperature and pressure, two chlorine atoms form the diatomic molecule Cl < sub > 2 </ sub >.
At room temperature the magnitude of this fractionation is roughly 0. 25 ‰ ( 0. 025 %) per atomic mass unit ( AMU ).
At room temperature, the average speed of these random motions is 10 < sup > 6 </ sup > metres per second.
At standard temperature, pressure and concentration conditions, the cell's emf ( measured by a multimeter ) is 0. 34 V. By definition, the electrode potential for the SHE is zero.
At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular formula H < sub > 2 </ sub >.
At room temperature, honey is a supercooled liquid, in which the glucose will precipitate into solid granules.
At lower altitudes, the increased temperature is like day and night, literally: like starting the morning at the highland daytime high, and then adding the heat of the day, again.
At too low temperature, most LC materials will form a conventional crystal.
At Standard Sea Level conditions ( corresponding to a temperature of 15 degrees Celsius ), the speed of sound is 340. 3 m / s ( 1225 km / h, or 761. 2 mph, or 661. 5 knots, or 1116 ft / s ) in the Earth's atmosphere.
At standard temperature and pressure, two atoms of the element bind to form dioxygen, a very pale blue, odorless, tasteless diatomic gas with the formula.
At standard temperature and pressure, oxygen is a very pale blue, odorless gas with the molecular formula, in which the two oxygen atoms are chemically bonded to each other with a spin triplet electron configuration.
At higher elevations from, the Puna ecoregion, the temperature varies from during the night versus during the day.
At this site, there are four main life zones, delineated on the basis of temperature and precipitation ( Holdridge System ), in the Luquillo Mountains: subtropical wet and subtropical rain forests are found at low and mid elevations, lower montane rain and lower montane wet forests at high elevations.
At this stage, several factors are critical to yield: optimal soil moisture and temperature, soil nutrient availability and balance, and resistance to pest attacks.
At room temperature and pressure, the water jar reaches equilibrium when the air over the water has a humidity of about 3 %.
At the point where liquid begins to condense, the direction of the temperature and pressure curve will abruptly change to trace along the phase line until all of the water has condensed.
At a lower temperature, each strand is then used as the template in DNA synthesis by the DNA polymerase to selectively amplify the target DNA.
At the time, the temperature of the Sun was considered too low to overcome the Coulomb barrier.

0.860 seconds.