Question

Air sebanyak 540 cm^3 mengalir melalui pipa berdiameter 8 mm selama 1 menit. Kecepatan rata - rata aliran air adalah...
a. 3,6 m/s
b. 4,6 m/s
c. 5,6 m/s
d. 6,6 m/s
e. 7,6 m/s

Answer 1

Dik :
volume = 540 cm³ = 54 x 10 ⁻⁵ m³
d = 8mm = 8 x 10⁻³ m
t = 1 menit = 60 s
dit
v ...?
Q = Volume / t
Q = 54 . 10⁻5 / 60
Q = 9 x 10⁻⁶

A = 1/4п(d)²
A = 1/4 x 3,14 x (8 x 10⁻³)²
A = 1/4 x 3,14 x 64. 10⁻⁶
A = 50,24 x 10⁻⁶

Q = A . v
9.10⁻⁶ = 50,24.10⁻⁶ . v
v= 0,17