We Cannot Effectively Clean Nonpolar Substances from Our Hands or Clothing

question 22

Multiple Choice

We cannot effectively clean nonpolar substances from our hands or clothing with water alone;we must add soap or detergent.The structure of a typical soap molecule is shown below.Which region of this molecule would dissolve in a nonpolar substance such as grease?

• A)Region 1
• B)Region 2
• C)Region 3
• D)Region 4

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Definitions:

Binding Constraint

A constraint in an optimization problem that directly limits the ability to achieve an optimal solution, where any relaxation of the constraint would improve the outcome.

Slack

The amount of time a project task can be delayed without causing a delay to subsequent tasks or the overall project deadline.

Zero

The integer that precedes the positive one and follows the negative one; it is neither negative nor positive.

D-type Steel Sheets

Specific grade of steel sheets characterized by certain mechanical properties and composition, often used in manufacturing.