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vichka [17]
3 years ago
8

A água escoa dentro de um tubo, como mostra a figura abaixo, com uma taxa de escoamento de 0,10 m 3 /s. O diâmetro no ponto 1 é

0,4 m. No ponto 2, que está 3,0 m acima do ponto 1, o diâmetro é 0,20 m. Se o ponto 2 está aberto para a atmosfera, determine a velocidade nos pontos 1 e 2.
Spanish
1 answer:
Lyrx [107]3 years ago
5 0

Answer:

A1v1 = A2v2 = 0,1 m 3/ s    

          ⇒ v1  =  0,1 m³/s / π(0,2 m)²

 =  0,8  m/s    

 and       v =  0,1 m³/s / π(0,1 m)²  

 =  3,2  m/s

Segundo, usamos a equação de Bernoulli para determinar a diferença de pressão entre os extremos do tubo:

 

P1 - P2 =  ½ ρ(v2² - v1²) + ρg(h2 - h1)    

 = ½ × 10³ kg/m³ . ((3,2  m/s )² - (0,8  m/s )²) + 10³ kg/m³ . 9,8 m/s² . 3,0  m

 = 34.200 N/m 2

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