fluiavide.py

Created by bilouclic

Created on January 07, 2024

1.06 KB


Loi De Mariote :

Ex : on souffle air = 1,2L  
rayon = 6.
mesuré a pression atmo =
1,013x10(pui 5)

On cherche la pression
nouvelle dans le ballon:
 
 Air injécté   Air dans
            |le ballon
V1 = 1,2L     
              V2 = 4/3
              * pi * R(3)
              = 9,0*10(2)  
P1 = 1,013
x10(pui 5)
            |P2= ?
            |   
Calculer le volume d'un
cylindre :

pi*R(2)*h

On utilise la loi
de mariote pour calculer
P1*V1=P2*V2

on converty cm(3)
en ml 
1cm(3)=1ml

lorsque P/2 alors 
V*2

Force pressente :
c'est l'action des fluide
sur des parroi


    |
*>  |----->F(vecteur)
    |
    
F(N) = P * S(m2)

Ex

Calculer la force 
pressente 
20cm surface
P = 3.0x10(5)

surface disque :
  pi * R2

pi * (10 x 10 pui-2)2
pour mettre en m2
9.3 N 

Loi fondamentale 
statiue des fluide :

quelle pression
sur le plongeur

Donnée : 
  Peau = 1000 kg . m (-3)

profondeur = 10m
g = 9,8 N.kg-1

Forumule :
  
Pb - Pa = p g ( ZA - ZB)
Pa , masse volumique 
kg .m-3
N.kg-1
en metre

Exo : 
  
P(plongeur)- P(surface)
= Peau g ( Zsurface - 
Z plongeur)


  

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