Answer:
Super critical
1.2 m
Explanation:
Q = Flow rate = 
w = Width = 3 m
d = Depth = 90 cm = 0.9 m
A = Area = wd
v = Velocity
g = Acceleration due to gravity = 

Froude number is given by

Since
the flow is super critical.
Flow is critical when 
Depth is given by

The depth of the channel will be 1.2 m for critical flow.
Answer:
False even if its not engineering u need more than one solutions before it is completed
Explanation:
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Answer:
yes you got it correct
Explanation:
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Answer:
μ = 0.55
Explanation:
Given that
Normal weight = 1.8 x weight of person
N= 1.8 mg
We know that friction force Fr
Fr= μ N
μ=Coefficient of friction
N=Normal force
To find μ We have to equate friction and gravity force
Fr= Wt
μ N = m g
μ x 1.8 m g = m g
μ = 0.55
So the coefficient of friction will be 0.55.