Using the permeability coefficients for low density polyethylene and polypropylene in the table below, choose the correct statements. Permeability coefficient PM [x10-13 (cm³ STP) (cm)/(cm²-s-Pa)] N₂ Polymer Low density Polyethylene Polypropylene 0₂ 2.2 1.2 0.73 0.22 CO₂ 9.5 5.4 □a. A pressurized polypropylene vessel containing O₂ at a pressure of 150 kPa with an ambient CO₂ pressure of 50 kPa would go flat faster than a pressurized LDPE vessel containing N₂ at a pressure of 750 kPa and ambient N₂ pressure of 250 kPa b. The greater the molecular weight of a molecule is, the lower it's permeability will be c. A pressurized polypropylene vessel containing CO₂ at a pressure of 150 kPa with an ambient CO₂ pressure of 50 kPa would go flat faster than a pressurized LDPE vessel containing N₂ at a pressure of 750 kPa and ambient N₂ pressure of 250 kPa d. A pressure difference of 1000 kPa would cause the same flux of N₂ through polypropylene as a pressure difference of 100 kPa would cause for O₂ through LDPE

Using the permeability coefficients for low density polyethylene and polypropylene in the table below, choose the correct statements. Permeability coefficient PM [x10-13 (cm³ STP) (cm)/(cm²-s-Pa)] N₂ Polymer Low density Polyethylene Polypropylene 0₂ 2.2 1.2 0.73 0.22 CO₂ 9.5 5.4 □a. A pressurized polypropylene vessel containing O₂ at a pressure of 150 kPa with an ambient CO₂ pressure of 50 kPa would go flat faster than a pressurized LDPE vessel containing N₂ at a pressure of 750 kPa and ambient N₂ pressure of 250 kPa b. The greater the molecular weight of a molecule is, the lower it's permeability will be c. A pressurized polypropylene vessel containing CO₂ at a pressure of 150 kPa with an ambient CO₂ pressure of 50 kPa would go flat faster than a pressurized LDPE vessel containing N₂ at a pressure of 750 kPa and ambient N₂ pressure of 250 kPa d. A pressure difference of 1000 kPa would cause the same flux of N₂ through polypropylene as a pressure difference of 100 kPa would cause for O₂ through LDPE

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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