Post on 28-Aug-2018
SESSION 2017 PCPH003
EPREUVE SPECIFIQUE - FILIERE PC ____________________
PHYSIQUE
Mercredi 3 mai : 8 h - 12 h
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N.B. : le candidat attachera la plus grande importance à la clarté, à la précision et à la concision de la rédaction. Si un candidat est amené à repérer ce qui peut lui sembler être une erreur d’énoncé, il le signalera sur sa copie et devra poursuivre sa composition en expliquant les raisons des initiatives qu’il a été amené à prendre.
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η
η
π
⋅= ⋅ +
⋅ ⋅
ρη
( )= = ( )= =
( ) ( )= ⋅
( )Σ
( )( )η= ⋅ ⋅Σ ⋅
( )ρ ρ η∂
⋅ + ⋅ ⋅ = − + ⋅∆∂
( ) η ⋅ ∆
θ
+
( )Σ + −
( )Σ
η θ
= ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
θ
( ) ( )= − − ⋅ ( )( ) ( )
η
−= ⋅ −
⋅ ⋅
η
π
⋅ ⋅=
⋅
α= ⋅ α <<
α
( ) ( )ρ ρ ρ= + ( ) ( ) ( )= +
ρ ( )ρ ( )
( )ρ ρ>> ( )>> ( )ρ ( ) ( )
( ) ( ) ( )= +
( )∂
= ⋅ ∂ ∂
∂
≈ ⋅
ρχ
ρ
∂ = ⋅ ∂
ρ
χρ
≈ ⋅
ρ
∂ ∂⋅ = −
∂ ∂
+ ( ) ⋅
+
ρρ ρ
∂ ∂ ∂⋅ ⋅ + ⋅ + ⋅ =
∂ ∂ ∂
( )
χ∂ ∂
+ ⋅ = −∂ ∂
( )
ρ χ
ρ=
⋅
ℜ
⋅−
= ⋅⋅
−
ℜ
= ⋅
θ
θ
θ
θ ∆ = −
θ
ℜ
+ → + +
→ → → →
=+
−= ⋅ ⋅
επ
−= ⋅⋅ ⋅
−= ⋅
−= ⋅
−= ⋅ ⋅
( )( )
−= ⋅
−
ηϕ
α = ≈
ρ
ν⋅ = −
α
λ
βδ γ
λδ λγ λβ λαδγβα
θ
θ
= ⋅
( )θ =
ε
π= ⋅ = ⋅
⋅
∈= ⋅ −≈ ⋅
= − ε
θ
θ
λ
= ⋅ −
=
αλ =
=
µ =+
− ≈ − ⋅ ⋅
−
α α
α
λ λ
λ
−λα α
λα α
( )
•
= ⋅
= − ⋅
IM
PR
IM
ER
IE
NA
TI
ON
AL
E –
17
1184
– D
’ap
rès
do
cum
ents
fo
urn
is