No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
CURRENT ToPics. [J. F. I. by failing through some dozens of volts is of the same order as the lengths of x-rays. Hence it seemed worth while to test the correctness of the equivalence of electrons to waves by seeing whether crystals would diffract electrons. Davisson and Germer in New York were the
The displacement of vises to which a force of 50 Ibs. was applied was measured. The vertical displacements were small, being only โข oo5, .oo3, and .oo4 in. respectively for 2, 5ยฝ and 9 in. vises. The horizontal displacement for the application of 5o lbs. force were, for the same three vises, .o4, .o
The results of experiments with paper, sailcloth, felt, fibre board, mahogany and brick work are given. In general the transmission ratio grows less as the frequency of the test sound rises from 300 to 16oo cycles per sec. Cartridge paper transmitted .5 of the incident energy while only a few millio