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Propriedades eléctricas dos materiais


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About the Book

Basta olhar para os números para compreender verdadeiramente o grau de caos presente num metal. À temperatura ambiente, um único eletrão no cobre tem uma velocidade máxima teórica de 1570 km/s, ou seja, mais rápida do que a velocidade do som no ar! Embora este eletrão viaje a velocidades extremamente elevadas, em breve colidirá com outro eletrão e será impelido na direção oposta, não percorrendo absolutamente nada. Mesmo com uma fonte de energia, o caos interno de um metal impede que um eletrão percorra mais de 23 micrómetros num segundo, ou seja, aproximadamente a largura de um cabelo humano. O eletrão encontra obstáculos com tanta frequência que a distância média que consegue percorrer é irrisória. Assim sendo, pode parecer que a eletricidade é uma forma muito ineficiente de transferir energia, e há razões para isso. Porque há tantos electrões a moverem-se através de um fio, mesmo que cada um siga um caminho sinuoso e serpenteante, o seu número cria uma poderosa transmissão de energia.


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Product Details
  • ISBN-13: 9786206101789
  • Publisher: KS Omniscriptum Publishing
  • Binding: Paperback
  • Language: Portuguese
  • Returnable: N
  • Weight: 145 gr
  • ISBN-10: 6206101789
  • Publisher Date: 18 Jun 2023
  • Height: 229 mm
  • No of Pages: 56
  • Spine Width: 3 mm
  • Width: 152 mm


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Propriedades eléctricas dos materiais
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