5
if zero falls between two significant numbers it becomes significant.
Answer:
a) 
b) 
c) Q = 1.256 × 10⁻³ m³/s
Explanation:
Given:
The velocity profile as:

Now, the maximum velocity of the flow is obtained at the center of the pipe
i.e r = 0
thus,

or

Now,

or

or

Now, the flow rate is given as:
Q = Area of cross-section of pipe × 
or
Q = 
or
Q = 
or
Q = 1.256 × 10⁻³ m³/s
This problem refers to a parallel plate capacitor. There is
an electric field between the two plates. The working equation to be used is
the Gauss’s Law which is
Electric field = Surface charge density / ε0
The answer is -2.52 μC/m2.
Answer:
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