Why Is a Permanent Wave Not Really Permanent

question 101

Multiple Choice

Why is a permanent wave not really permanent?

• A)The chemicals used to treat the hair break down.
• B)Untreated new hair grows in to replace treated old hair.
• C)Disulfide bonds breaks and re-form every time you wash your hair.
• D)The keratin in the hair is no longer flexible.

Explain the importance of control groups in experiments.

Recognize methods to minimize experimenter expectancy effects and understand their importance in maintaining internal validity.

Understand the concept of project crashing and its impact on project cost and schedule.

Calculate crash cost per period for project activities.

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