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In an isentropic expansion of a real gas, the relationship pv γ = C (γ, C constant) is not exact. A development is given for an accurate exponent α (the effective ``gamma''), related to the ratio of specific heats, which permits the use of the relationship p 0 v 0 α = p 1 v 1 α for an...
The velocity of the luminous anode spark produced in CuSO 4 solutions by application of impulsive potential has been measured as a function of the interelectrode gap, input voltage, and solution normality. Determinations were made for input potentials of 15–30 kv, interelectrode gaps of 15–80...
A brief discussion of electron and ion microscopes is presented followed by a description of a low magnification, electrostatic ion microscope. This instrument is of the emission type wherein the source of positive ions is imaged. If more than one species of ion is emitted, the images...
A method of measuring cavity impedance is described.
A liquid subjected to negative pressure is metastable; vapor bubbles form spontaneously and grow until the pressure of the system rises to the equilibrium vapor pressure. The rate of bubble formation is calculated from the theory of nucleation, and the negative pressure p t that gives one bubble...
The paper is devoted to a discussion of the properties of electromagnetic waves propagating with a velocity W < c . Boundary conditions are obtained for structures with very narrow slots, either closed or open, and a general method of solution of the wave equations is discussed. Fields in the...
A note pointing out that the claim made by Bidwell and Hogan Journal of Applied Physics 18 , 776 (1947), that the relation k∕ρC=K (1∕T)+ K 1 , where k is the thermal conductivity, ρ the density, C the specific heat, T the absolute temperature and K and K 1 are constants, holds for...
Electron diffraction patterns of thin Bi films were studied by the method of microphotometer density curve analysis to determine changes of the film structure with aging and with increase in thickness of the films. All Bi films were deposited on Formvar by evaporation in vacuum. Analysis of the...
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