 507  71. In the following the analysis of symmetrically-loaded stairs with both ends fixed is described. 72. Essentially, in this model the crystal is assumed to be entirely ionic with no exchange between charge clouds of adjacent ions. 73. Infra-red rays being invisible to us, photographic films and plates are made to-day which are sensitive to them. 74. There is a certain amount of interaction between the tuning and loading functions, but it is not excessive at normal values of Q-factor. 75. However plentiful the ore may be the extraction of a metal will not be profitable unless it is sufficiently suitable for some purpose to be sold at a price that will pay for extraction. 76. The input signal was taken to be a fast wave at the cyclotron frequency, which meant that all the electrons had orbit radius s and the same time phase of rotation, assumed to be zero. 77. Never before has there been any device so versatile and efficient in handling electricity as the electron tube. 78. For other types of signals the carrier level may have to be increased. 79. The neutron may be considered in fact as being exposed to a time-dependent electric field. 80. At higher energies electric dipole radiation can be expected to give rise to D state in the continuum. 81. Generally speaking, a liquid having a free surface is one on whose surface there is absolutely no pressure. 82. The sulfite liquors of the paper mill are being worked up into industrial alcohol. 83. To-day it seems certain that a given ion does have a definite mobility, one that does not change with time. 507 |
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