Answer:
Explanation:
We have to combine the following formula to find the mass yield:
The diffusion coefficient :
The area :
Time :
ΔC:
Δx:
Now substitute the values
Why is it important that ironworkers wait to begin work until after cement masons are finished with their job?
1 answer:
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Answer:
The roll force is 1.59 MN
The power required in this operation is 644.96 kW
Explanation:
Given;
width of the annealed copper, w = 228 m
thickness of the copper, h₀ = 25 mm
final thickness, hf = 20 mm
roll radius, R = 300 mm
The roll force is given by;
where;
w is the width of the annealed copper
is average true stress of the strip in the roll gap
L is length of arc in contact, and for frictionless situation it is given as;
Now, determine the average true stress, , for the annealed copper;
The absolute value of the true strain, ε = ln(25/20)
ε = 0.223
from true stress vs true strain graph; at true strain of 0.223, the true stress is 280 MPa.
Then, the average true stress = ¹/₂(280 MPa.) = 180 MPa
Finally determine the roll force;
The power required in this operation is given by;
To resolve this problem we have,
is unknown.
With these dates we can calculate the Flexural strenght of the specimen,
After that, we can calculate the flexural strenght for the square cross section using the previously value.