 511  121. With the above principles of thermocouple construction in mind, data largely taken from the recent work of Rosi, Dis-mukes, and Hockings are presented on the evaluation of compound semiconductors and alloys for power generation over specific temperature ranges. 122. Auxiliary experiments with grid spacing between 0,05 and 1 cm, show, however, no measurable influence of this parameter on the phase velocity and attenuation. 123. The sodium content was determined by reading the optical density at 589 m, whereas potassium was measured at 768 m?. The sodium content determined may be higher than was actually present in the cells because of the sodium chloride in the suspending medium. 124. It was not, however, until World War II that the speed advantages of electronics were exploited. 125. The investigation of the reaction product of mesityl oxide with phosphorus trichloride in the presence of acetic anhydride gave the proved structure of the intermediate as being identical with the product discussed in Section XIII, and obtained from diacetone alcohol. 126. It would be much more convenient if a machine were available that would automatically give the gain change in decibels and phase change in degrees for a given change in frequency. 127. Also shown in the figures is the dependence of the phase velocity and the damping on frequency, as predicted by Gould's theory. 128. It is by the agency of radio that we receive most of the information the satellites are collecting at the borders of space. 129. It will be seen later that, with sensible values for the operating parameters, this statement remains substantially true when large-signal effects are taken into account. 130. The weight of all the molecules of a substance being the same, the molecules are considered to be composed of exactly the same number and the same kind of atoms. 131. To learn what the child must learn in order to function as an adequate human being, he must have a large brain. It is a striking fact that by the time the human child has attained its third birthday it has also virtually achieved the full adult size of the brain. 511 |
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