At 265 hours and 37 minutes into the mission, at a velocity of about, Apollo 16 began atmospheric reentry.

At a pressure of 55 GPa ( roughly 540 times atmospheric pressure ) bromine converts to a metal.

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 higher elevations, where the atmospheric pressure is much lower, the boiling point is also lower.

At 25 ° C and atmospheric pressure, one liter of water dissolves 3. 26 g or 1. 125 L of gaseous chlorine.

At the bottom of the trench, where the plates meet, the water column above exerts a pressure of, over one thousand times the standard atmospheric pressure at sea level.

At 100 ° C and atmospheric pressure, equilibrium is not reached until the air is 100 % water.

At atmospheric pressure the mean free path of air is about 70 nm.

At the other end of the scale, helium does not freeze at all at normal pressure, even at temperatures very close to absolute zero ; pressures over 20 times normal atmospheric pressure are necessary.

At high latitudes ( near the Earth's poles ), they are very low, making communication difficult or impossible due to factors such as atmospheric refraction, Earth's thermal emission, line-of-sight obstructions, and signal reflections from the ground or nearby structures.

At a pressure of above atmospheric pressure, water in a pressure cooker can reach a temperature of up to.

At high elevations, the Earth's atmosphere is thinner thereby minimizing the effects of atmospheric turbulence and resulting in better astronomical " seeing ".

At night, the same receiver may pick up signals as far away as 1110 KFAB in Nebraska reliably, depending on atmospheric noise and man-made interference.

At the time of its upgrade, the storm was located in an area of higher than normal atmospheric pressure, although conditions favored further development.

At altitude, atmospheric pressure is lower than at sea level, so surfacing at the end of an altitude dive leads to a greater reduction in pressure and an increased risk of decompression sickness.

At atmospheric pressure, liquid nitrogen boils at and is a cryogenic fluid which can cause rapid freezing on contact with living tissue.

At the short wavelength end the cut-off is determined by the atmosphere ; specifically atmospheric seeing.

At the time, Canada only possessed upper atmospheric launch capabilities, and therefore Alouette 1 was sent aloft by the American National Aeronautics and Space Administration ( NASA ) from Vandenberg AFB in California.

At sea level, an ambient temperature of 70 ° F ( 21 ° C ), and under normal atmospheric conditions, the speed of sound is approximately per second ( 347 m / s ).

At present, the highest temperature superconducting materials are the cuprates, which have demonstrated superconductivity at atmospheric pressure at temperatures as high as-135 ° C ( 138 K ).

At 1200 UTC, Agnes reached its minimum atmospheric pressure of, as reported by a reconnaissance aircraft.

At liquid level in the top reservoir, the liquid is under atmospheric pressure, and as one goes up the siphon, the hydrostatic pressure decreases ( under vertical pressure variation ), since the weight of atmospheric pressure pushing the water up is counterbalanced by the column of water in the siphon pushing down ( until one reaches the maximum height of a barometer / siphon, at which point the liquid cannot be pushed higher ) – the hydrostatic pressure at the top of the tube is then lower than atmospheric pressure by an amount proportional to the height of the tube.

At the same time, there was increased reason for a quick meeting lest the Soviet leader, as a result of those episodes, come to a dangerously erroneous conclusion about the West's ability and determination to resist Communist pressure.

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 standard temperature and pressure, two chlorine atoms form the diatomic molecule Cl < sub > 2 </ sub >.

At low pressure, there was enough space between the gas atoms that the ions could accelerate to high enough speeds that when they struck another atom they knocked electrons off of it, creating more positive ions and free electrons in a chain reaction.

At these very high vacuums the effect of photon radiation pressure on the vanes can be observed in very sensitive apparatus ( see Nichols radiometer ) but this is insufficient to cause rotation.

At boiling point, all volatile components boil, but for a component, its percentage in the vapor is the same as its percentage of the total vapor pressure.

At the moment, it is not known how the material is produced or if it remains stable without applied pressure, however, there is conjecture that it is possible to produce a new stable state of matter by compressing ultracold deuterium in a Rydberg state.

" Interviewed for the same broadcast, Mullen said the policy would continue to be implemented until the law was repealed, and that his advice was to " move in a measured way ... At a time when we're fighting two conflicts there is a great deal of pressure on our forces and their families.

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 the 2010 World Cup itself England drew their opening two games leading to questions about the team's spirit, tactics and ability to handle pressure.

At the same time, Relena formally dissolves the Sanc Kingdom due to the tremendous pressure from Romefeller.

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 those times when John was preparing for campaigns in Normandy, for example, huge quantities of silver had to be withdrawn from the economy and stored for months, which unintentionally resulted in periods during which silver coins were simply hard to come by, commercial credit difficult to acquire and deflationary pressure placed on the economy.

Lithium is superconductive below 400 μK at standard pressure and at higher temperatures ( more than 9 K ) at very high pressures (> 20 GPa ) At temperatures below 70 K, lithium, like sodium, undergoes diffusionless phase change transformations.

At this pressure the density of water is increased by 4. 96 %, making ninety-five litres of water under the pressure of the Challenger Deep contain the same mass as a hundred litres at the surface.

At such depths, water pressure is extreme and there is no sunlight, but some life still exists.

At a synapse, the membrane of the axon closely adjoins the membrane of the target cell, and special molecular structures serve to transmit electrical or electrochemical signals across the gap.

At temperatures near 0 K, nearly all molecular motion ceases and, when entropy = S, ΔS = 0 for any adiabatic process.

At the molecular level, an antigen can sometimes be characterized by its ability to be " bound " at the antigen-binding site of an antibody.

At about the same time the development of effective polymerase chain reaction techniques allowed the application of cladistic methods to biochemical and molecular genetic traits of organisms as well as to anatomical ones, vastly expanding the amount of data available for phylogenetics.

At the same time, the methods of molecular mechanics, such as MM2, were developed, primarily by Norman Allinger.

At the lower end of the visible light spectrum, EMR becomes invisible to humansinfrared because its photons no longer have enough individual energy to cause a lasting molecular change ( a change in conformation ) in the visual molecule retinal in the human retina.

At the molecular level, the basic questions addressed in molecular neuroscience include the mechanisms by which neurons express and respond to molecular signals and how axons form complex connectivity patterns.

At this level, tools from molecular biology and genetics are used to understand how neurons develop and how genetic changes affect biological functions.

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 present, the precise molecular genetics and biochemistry of the melanism in this species remains unknown.

" At the same time, the author guidelines for the journal " Rapid Communications in Mass Spectrometry " stated " The Dalton ( Da ) is a unit of mass normally used for the molecular weight ... use of the Da in place of the u has become commonplace in the mass spectrometry literature ...

At moderate frequencies, the energy is too high to cause rotation, yet too low to affect electrons directly, and is absorbed in the form of resonant molecular vibrations.

At the time Graham did his work the concept of molecular weight was being established, in large part through measurements of gases.

At the molecular level, NMS is caused by a sudden, marked reduction in dopamine activity, either from withdrawal of dopaminergic agents or from blockade of dopamine receptors.

At the molecular level, these drugs resulted in reversal of a pathologic interferon-gamma gene expression signature.

At a molecular level, initiation of fruiting body development is regulated by Pxr sRNA.

At this point ( the late 1970s and early 1980s ) little was known about the genetic and molecular mechanisms by which multicellular organisms develop from single cells to morphologically complex forms during embryogenesis.

At his full strength and power, Gambit can control all aspects of kinetic energy down even to the molecular level, allowing him to manipulate the potency of his bio-kinetic energy to burn, cause molecular discomfort, incinerate, create timed detonations ( and manipulate the potency of the energy release ), fire energy blasts, defy gravity, heal wounds, charge objects within his line of sight without contact, and effectively exist as an energy being.

At a molecular level, Na < sup >+</ sup > ions stabilize amino acid binding at the substrate site and also hold the transporter in an outward-open conformation that allows substrate binding.

At the molecular level this is associated with overexpression of heat shock and erythrocyte binding surface proteins with the reduced expression of a cell-cycle regulator and a DNA biosynthesis protein.