By adding "-once", one can form the noun form of the word "organize" is that true or false?
2 answers:
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Answer:
manning's coefficient is 0.0357
Explanation:
Given:
Velocity of flow, v = 12 m/s
Width of the channel, b = 6 m
Depth of the channel, d = 2 m
bed slope, s = 0.001
mean velocity of flow, V = 1 m/s
now, the velocity is given as:
where,
n is the manning's coefficient
R is hydraulic mean depth
R = (Area of the channel) / (wetted Perimeter of the channel)
now,
R = (2 × 6) / ((2 × 2) + 6)
or
R = 12 / 10 = 1.2 m
now, on substituting the values in the equation for velocity, we get
or
or
n = 0.0357
hence, the value of manning's coefficient is 0.0357
Answer:
0.16 micron per day
Explanation:
Given:
The initial crack length, a₁ = 0.1 micron = 0.1 × 10⁻⁶ m
Initial tensile stress, σ₁ = 120 MPa
Final stress = 30 MPa
now from Griffith's equation, we have
where,
Gc and E are the material constants
now,
for the initial stage
........{1}
and for the final case
............{2}
on dividing 1 by 2, we get
or
a₂ = 4² × 0.1 × 10⁻⁶ m
or
a₂ = 1.6 micron
Now,
the change from 0.1 micron to 1.6 micron took place in 10 days
therefore, the rate at which the crack is growing =
or
average rate of change of crack = 0.16 micron per day