Answer:
The flow speed in the urethra is 3.77 m/s
Explanation:
The flow rate or speed of a liquid is a measure of the volume of liquid that flows in a given amount of time.
Fluid flow rate, Q = area of the pipe or channel × velocity of the liquid
Q = A × v ; where Q is in m³/s or L/s; A is in m²; velocity, v = is in m/s
Also flow rate, Q = volume/time
volume, V, is in m³ and time is in seconds
therefore, V/t = A × v
v = At / V
Volume, V = 400 mL = 0.4 L = 4 × 10⁻⁴ m³
Area, A, of tube = πr², where r is radius in meters
r = 4 mm = 4 × 10⁻³ m
A = 22/7 × (4 × 10⁻³ m)²
therefore, v = {22/7 × (4 × 10⁻³ m)² × 30}/4 × 10⁻⁴ m³
v = 3.77 m/s
Therefore, the flow speed in the urethra is 3.77 m/s
