Answer:
b. 336,000.
Explanation:
Step 1: Calculate the molecular weight of the monomer
Polyethilene is a polymer with the formula (C₂H₄)ₙ, where C₂H₄ is the monomer and n is the number of monomers in the polymer. We can calculate the molecular weight of the monomer by addition of the weights of the atoms that form it.
MC₂H₄ = 2 × MC + 4 × MH
MC₂H₄ = 2 × 12 + 4 × 1 = 28
Step 2: Calculate the average molecular weight of polyethylene
The average degree of polymerization (DP) of polyethylene is 12,000. We can calculate the average molecular weight of polyethylene using the following expression.
DP = M(C₂H₄)ₙ/MC₂H₄
M(C₂H₄)ₙ = DP × MC₂H₄
M(C₂H₄)ₙ = 12,000 × 28 = 336,000
Answer:
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Answer:
The percent elongation in the length of the specimen is 42%
Explanation:
Given that:
The gage length of the original test specimen
= 50 mm
The final gage length
= 71 mm
The area = 206 mm²
maximum load = 162,699 N
To determine the percent elongation in %, we use the formula:
![\%EL = \dfrac{L_f-L_o}{L_o}\times 100](https://tex.z-dn.net/?f=%5C%25EL%20%3D%20%5Cdfrac%7BL_f-L_o%7D%7BL_o%7D%5Ctimes%20100)
![\%EL = \dfrac{71 \ mm-50 \ mm}{50 \ mm}\times 100](https://tex.z-dn.net/?f=%5C%25EL%20%3D%20%5Cdfrac%7B71%20%5C%20mm-50%20%5C%20mm%7D%7B50%20%5C%20mm%7D%5Ctimes%20100)
![\%EL = \dfrac{21 mm}{50 \ mm}\times 100](https://tex.z-dn.net/?f=%5C%25EL%20%3D%20%5Cdfrac%7B21%20mm%7D%7B50%20%5C%20mm%7D%5Ctimes%20100)
![\%EL = 0.42 \times 100](https://tex.z-dn.net/?f=%5C%25EL%20%3D%200.42%20%5Ctimes%20100)
![\mathbf{\%EL = 42 \%}](https://tex.z-dn.net/?f=%5Cmathbf%7B%5C%25EL%20%3D%2042%20%5C%25%7D)
The percent elongation in the length of the specimen is 42%