Tlie Velocity of Sound in Gases at Low-Pressures

Transmission of Sound Waves in Gases at Low Pressures

Midway through World War II it became apparent that a better understanding of the motion and interaction of gaseous media with solid objects was needed. As aircraft flew at higher altitudes, approaching the speed of sound, strange shock wave effects interrupted normal flight. Propulsion mechanisms became challenged by the rapid increases in frictional drag. At the same time, the fledgling nucle...

Ordering in lattice gases at low temperature

We show that for generic short-range classical lattice gas models the third law of thermodynamics holds-entropy goes to zero with temperature. The most fundamental aspect of low-temperature matter is its highly ordered (crystalline) structure, which distinguishes it from the fluid state and is necessary for most of the characteristic features of solids. Attempts to discover the causes of this o...

Third sound velocity in thin films of 3He-4He mixtures at low temperature

2014 We present third sound velocity measurements in thin films of 3He-4He mixtures down to 0.1 K. The low temperature behaviour of this velocity suggests the existence of a phase separation perpendicular to the walls even for a film mixture of 3.7 layer thickness. J. Physique LETTRES 42 (1981) L-197 L-200 lel’ MAI 1981,

Velocity crossover between hydrous and anhydrous forsterite at high pressures

Corneal swelling at low atmospheric oxygen pressures

both cornea and conjunctiva occurred as early as 15 min after bacterial inoculation. By 1 to 3 hr after bacterial inoculation, shrinkage of corneal epithelial cells was pronounced (Fig. 5, a and b). Fewer microvilli were seen on the shrunken regions of these affected cells, and the cell surfaces appeared roughened and irregular. Additionally, intercellular junctions were dilated to 1.0 fim in d...