Coșul tău de cumpărături
Total: 0 leiLa coș
Excerpt: ...may be turned downward without fear of the drop falling off, as the mass possesses considerable viscosity. I may mention here another feature of some interest, which I believe to have noted in the course of these experiments, though the observations do not amount to a certitude. It appea.... Descrierea completă
Excerpt: ...may be turned downward without fear of the drop falling off, as the mass possesses considerable viscosity. I may mention here another feature of some interest, which I believe to have noted in the course of these experiments, though the observations do not amount to a certitude. It appeared that under the molecular impact caused by the rapidly alternating potential, the body was fused and maintained in that state at a lower temperature in a highly exhausted bulb than was the case at normal pressure and application of heat in the ordinary way - that is, at least, judging from the quantity of the light emitted. One of the experiments performed may be mentioned here by way of illustration. A small piece of pumice stone was stuck on a platinum wire, and first melted to it in a gas burner. The wire was next placed between two pieces of charcoal, and a burner applied, so as to produce an intense heat, sufficient to melt down the pumice stone into a small glass-like button. The platinum wire had to be taken of sufficient thickness, to prevent its melting in the fire. While in the charcoal fire, or when held in a burner to get a better idea of the degree of heat, the button glowed with great brilliancy. The wire with the button was then mounted in a bulb, and upon exhausting the same to a high degree, the current was turned on slowly, so as to prevent the cracking of the button. The button was heated to the point of fusion, and when it melted, it did not, apparently, glow with the same brilliancy as before, and this would indicate a lower temperature. Leaving out of consideration the observer's possible, and even probable, error, the question is, can a body under these conditions be brought from a solid to a liquid state with the evolution of less light? When the potential of a body is rapidly alternated, it is certain Pg 252 that the structure is jarred. When the potential is very high, although the vibrations may be few - say 20,000 per...
Ești titular de carte ISIC sau ITIC?
Poți beneficia de reduceri foarte interesante la noi
|Titlu complet: The inventions, researches and writings of Nikola Tesla; with special reference to his work in polyphase currents and high potential lighting|
|Autor: Thomas Commerford Martin||Limba: engleză|
|Legare: Carte broșată||Data emiterii: 2014|
|Număr pagini: 172||EAN: 9781236023643|
|ISBN: 1236023641||Codul Libristo: 05254715|
|Editura: Books on Demand||Greutatea: 344|
|Dimensiuni: 189 x 246 x 9|
Este simplu, rapid și vei face o mulțime de bucurie. Utilizeză butonul de mai jos: Cumpără ca un cadou sau în coșul de cumpărături selectează ambalaj cadou și cartea va fi livrată în ambalja cadou frumos.
Poți returna mărfurile fără a da nici un motiv în termen de 30 de zile.
Vom ambala cărțile cu mare plăcere ca un cadou pentru o taxă mică.
Posibilitatea de alegere din milioane de titluri nu vă este oferită de oricine.
Trimitem cărțile bine ambalate în ambalaj special din carton solid.
Oferim reduceri pentru studenți și profesori.
Clienții fideli beneficează de cadouri și alte beneficii.
Livrăm bunurile imediat sau cât mai repede posibil.
Vă informăm despre fiecare etapă a procesării comenzilor.
Livrare gratuită pentru comenzi de peste 200 lei.
Poți face cadou orice carte din oferta noastră.
Ce cărți așteptăm în viitorul apropiat?