Jawabanmu

Jawaban paling cerdas!
2014-05-25T11:30:52+07:00
7 . Diket: Pipa mendatar
d₁ = 8 cm
d₂ = 4 cm = ½ d₁
v₁ = 2 m/s
P₁ = 10⁵ Pa

Dit: v₂, P₂
Jwb:
A₁ v₁ = A₂ v₂
¼ π d₁² v₁ = ¼ π d₂² v₂
d₁² v₁ = (½ d₁)² v₂
v₁ = 1/4 v₂
2 = 1/4 v₂
v₂ = 8 m/s

P = F/A
P ≈ 1/A

P₁/P₂ = A₂/A₁
P₁/P₂ = (¼ π d₂²) / (¼ π d₁²)
P₁/P₂ = (½ d₁)² / d₁²
P₁/P₂ = ¼
10⁵ Pa/P₂ = ¼
P₂ = 4 x 10⁵ Pa
1 5 1