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1. |
X‐Ray Crystal Measurements of Nickel at High Temperatures |
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Journal of Applied Physics,
Volume 5,
Issue 6,
1934,
Page 147-149
William P. Jesse,
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摘要:
X‐ray powder photographs have been made of an electrically heated nickel ribbon sealed into a thin‐walled glass bulb. X‐ray measurements extending from 450 to 1200°C showed no new high temperature crystal form of nickel. The thermal expansion of the face‐centered cubic lattice, present throughout the range investigated, is in agreement with macroscopic thermal expansion data.
ISSN:0021-8979
DOI:10.1063/1.1745242
出版商:AIP
年代:1934
数据来源: AIP
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2. |
The Charges on Droplets Produced by the Spraying of Liquids as Revealed by the Millikan Oil Drop Method |
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Journal of Applied Physics,
Volume 5,
Issue 6,
1934,
Page 150-152
Seville Chapman,
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PDF (161KB)
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ISSN:0021-8979
DOI:10.1063/1.1745243
出版商:AIP
年代:1934
数据来源: AIP
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3. |
Investigations of Turbulent Flow by Means of the Hot‐Wire Anemometer |
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Journal of Applied Physics,
Volume 5,
Issue 6,
1934,
Page 153-164
F. L. Wattendorf,
A. M. Kuethe,
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PDF (755KB)
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ISSN:0021-8979
DOI:10.1063/1.1745244
出版商:AIP
年代:1934
数据来源: AIP
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4. |
Propagation of Elastic Waves in Ice. Part I |
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Journal of Applied Physics,
Volume 5,
Issue 6,
1934,
Page 165-168
Maurice Ewing,
A. P. Crary,
A. M. Thorne,
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PDF (238KB)
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摘要:
Measurements of the velocity of sound vibrations in ice have been made in some detail both by direct and resonance methods. The velocity of longitudinal waves was measured directly on large bodies of ice. Blasting caps were used to create elastic disturbances and the time of travel was recorded by an electric seismograph placed at suitable distances. A plot of time against distance gives a remarkably straight line showing a velocity of 3410 m/sec. Laboratory measurements were made on long thin rods of ice which were excited by an oscillator and resonance frequencies measured both for longitudinal and torsional vibrations. The velocities for these vibrations are found to be 3163 m/sec. and 1913 m/sec., respectively. A formula is derived by which the velocity of longitudinal waves in a thin infinite plate can be found from these velocities. This formula gives a value of 3400 m/sec. which checks with that obtained directly by less than one percent. Various other elastic constants for ice are also deduced from these measurements. The values of Young's modulus and Poisson's ratio for ice are found to be 9.17×1010dynes/cm2and 0.365, respectively, in the range −5°C to −15°C.
ISSN:0021-8979
DOI:10.1063/1.1745245
出版商:AIP
年代:1934
数据来源: AIP
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