C. those properties that cannot be changed
Answer:
Explanation:
Given:
volume of urine discharged, 
time taken for the discharge, 
diameter of cylindrical urethra, 
length of cylindrical urethra, 
density of urine, 
a)
we have volume flow rate Q:
& 
where:
cross-sectional area of urethra
velocity of flow




b)
The pressure required when the fluid is released at the same height as the bladder and that the fluid is at rest in the bladder:



Answer:
The equivalent or total resistance of the circuit is 6
Explanation:
6 &6 are in series
6+6=r
r= 12
1/Rtotal= 1/12+1/2
1/Rt=2/12=1/6
Rt=6
Explanation:
An optical image formed from the apparent divergence of light rays from a point, as opposed to an image formed from their actual divergence.