Zobrazeno 1 - 10
of 32
pro vyhledávání: '"John R. Pellam"'
Publikováno v:
Physical Review Letters. 44:1645-1648
The inverse-square distance dependence of the gravitational force has been tested over a range of approximately 2 to 5 cm, by use of a test mass suspended from a torsion balance to probe the gravitational field inside a mass tube. The result supports
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fb705bf574c156b54daeadd0d26ac23
https://doi.org/10.1103/physrevlett.44.1645
https://doi.org/10.1103/physrevlett.44.1645
Autor:
Paul P. Craig, John R. Pellam
Publikováno v:
Physical Review. 108:1109-1112
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba09f1b53004ab3d46ae69d88940593d
https://doi.org/10.1103/physrev.108.1109
https://doi.org/10.1103/physrev.108.1109
Autor:
John R. Pellam, W. B. Hanson
Publikováno v:
Physical Review. 95:321-327
Second sound attenuation was measured in the hundred kilocycle per second frequency range with a continuous wave method. Measurements were carried out over the temperature interval from 1.25\ifmmode^\circ\else\textdegree\fi{}K to 2.17\ifmmode^\circ\e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61d903c225a27b5e97094e69819df778
https://doi.org/10.1103/physrev.95.321
https://doi.org/10.1103/physrev.95.321
Publikováno v:
Physical Review. 93:28-37
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51f6415eab1d7b1a2558beb2bcb3e6fa
https://doi.org/10.1103/physrev.93.28
https://doi.org/10.1103/physrev.93.28
Autor:
John R. Pellam
Publikováno v:
The Journal of the Acoustical Society of America. 11:396-400
An exact solution for the sound energy absorbed by an absorbing panel set in the surface of a large, rigid, plane wall is obtained. The ability of the strip for absorbing sound is given by a “shape factor” A, defined as the ratio of the energy re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52f904d23fb6997bf9afde1ed6118e9d
https://doi.org/10.1121/1.1916051
https://doi.org/10.1121/1.1916051
Autor:
John R. Pellam
Publikováno v:
Physical Review. 75:1183-1194
Pulse methods are applied to the case of second sound in liquid helium II. Both transmitter and receiver consist of thermal elements and d.c. pulses are used throughout. The advantages of pulsing are enumerated for the particular case of second sound
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ca6246b3035703506a396fa6834c589
https://doi.org/10.1103/physrev.75.1183
https://doi.org/10.1103/physrev.75.1183
Autor:
Richard H. Bolt, John R. Pellam
Publikováno v:
The Journal of the Acoustical Society of America. 12:24-30
An indirect experimental check is now obtained for the calculated “shape factor” for an absorbing strip of material in a reflecting wall, reported previously The effect of the strip on each of the component “partial waves” in the incident pla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79df6542bf4810dab9276dee5b543fb7
https://doi.org/10.1121/1.1916068
https://doi.org/10.1121/1.1916068
Autor:
John R. Pellam
Publikováno v:
Physics Today. 6:4-9
One of the strangest anomalies thus far exhibited by matter has been the special thermal wave property of liquid helium II, known as second sound. Characteristic of no other substance than helium II—that weird form adopted by liquid helium below th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c357a138d04bfea53146af132e4d2d8a
https://doi.org/10.1063/1.3061038
https://doi.org/10.1063/1.3061038
Autor:
John R. Pellam, Thomas R. Koehler
Publikováno v:
Physical Review. 125:791-794
Pure superflow is observed to exert a torque in flowing about an object of arbitrary shape. The magnitude of such torque agrees in every respect with expectations based on pure potential flow theory. The present results indicating pure potential flow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cb8ef23172cacee9167d2a5286d2171
https://doi.org/10.1103/physrev.125.791
https://doi.org/10.1103/physrev.125.791
Autor:
John R. Pellam, Gerald L. Pollack
Publikováno v:
Physical Review. 137:A1676-A1684
When the equations of first and second sound are modified to correspond to wave propagation in the presence of viscous forces on the normal fluid, two wave modes result. In the limit of large viscous forces, second sound becomes an overdamped thermal
Externí odkaz:
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https://doi.org/10.1103/physrev.137.a1676
https://doi.org/10.1103/physrev.137.a1676