Examlex
Which of the following is an example of physical change?
Placebo
An inactive substance or treatment that is designed to mimic the experimental treatment but has no therapeutic effect.
Volunteer Bias
A form of selection bias occurring when the characteristics of volunteers differ from those of the non-volunteers, potentially affecting the study's outcome.
Bookbinding Strength
The measure of durability and resistance to damage of the binding of a book, ensuring its longevity and usability.
Repetition
The act of repeating something, such as an exercise or a learning activity, to improve skill or memorization.
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