 503  19. From what has been said so far, one might think that alternating current has little advantage over a direct current. 20. The atomic bomb explosion may blow a hole in the ocean a mile in diameter, the size depending on the amount of plutoni-um used in the bomb. 21. The best compromise is to select a low-coefficient fixed inductance. 22. It should be stated that we are assuming throughout this chapter that the primary condition that the system be stable is already satisfied. 23. The larger the screen of a television receiver, the more light must it emit if the picture on it is to appear satisfactorily bright. 24. Such fluctuations, being sensitive to the exact location of channel boundaries, would not be expected to reproduce in successive determinations. 25. Working under hard conditions were all the early students of this new field of electronics. 26. Bohr'stheory of atomic structure turned out to be extremely fruitful in the explanation of various properties of atoms and molecules. 27. On close examination of a piece of granite we find it to be composed of several kinds of minerals having different degrees of hardness, different colours, and different properties in general. 28. As radio waves travel away from their point of origin, they become attenuated as a result of spreading out due to energy being lost in travel. 29. This value is subject to systematic errors, the most important one reflecting our lack of knowledge of the energy spectrum. 30. A gram of water is proved to change exactly to a gram of ice when freezing and to a gram of water vapour when evaporating. 31. The material damping is considered in a manner which seems to be as exact as it can be without the use of nonlinear equations. 503 |
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