Would You Expect Polypropylene to Be Denser or Less Dense

question 142

Multiple Choice

Would you expect polypropylene to be denser or less dense than low-density polyethylene? Why?

• A)Polypropylene should be more dense because because it has a greater molecular mass.
• B)Polypropylene should be more dense because its molecules are able to pack more closely together.
• C)Polypropylene should be less dense because its molecules are not able to pack together as tightly.
• D)Polypropylene should be more dense given that the polyethylene is already known to be of low density.

Evaluate the evidence suggesting a causal relationship in various epidemiological studies.

Distinguish between necessary and sufficient causes of disease.

Understand the role of temporality in establishing causality.

Recognize the importance of dose-response relationships in supporting causality.

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