Ndq; North Dakota Quarterly Volume 5

Ndq; North Dakota Quarterly Volume 5

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ...of its strong radio-active properties they called radium. The remarkable thing about this discovery was not only that this new and remarkable substance had been found, but still more that an absolutely new method of discovery had been brought to the aid of science. If it were not for the fact that radium was capable of emitting this radiation which could be observed by electrical means even tho it was concealed in a mixture of other substances, this remarkable substance would in all probability have escaped the notice of chemists for a very long time to come for it was with very considerable labor and difficulty that it was isolated by chemical means. There was thus added to the already long list of powerful methods of scientific attack another one even more remarkable than those hitherto known. Many new and interesting properties of these radio-active substances were discovered in rapid succession but these can not be entered upon at this time. It was found that these radiations consisted in part at least of tiny particles travelling with very high velocity, some being of the size of the electron and some of the size of the atom. An investigation of the velocity of these particular particles along with their mass led to another entirely new and fundamental physical conception. Scientists had always been accustomed to associate the mass of a substance with the material of which the substance was composed and had always considered the mass and material as inseparable and as one and the same thing. However, these new radio-active particles revealed the fact that under some conditions the apparent mass of these particles depends in part at least on the speed with which they are travelling. We must here again reconstruct one of our most...show more

Product details

  • Paperback | 152 pages
  • 189 x 246 x 8mm | 286g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236894715
  • 9781236894717