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Describe the energy changes that occur when a book is held 6 ft off the floor and then dropped.
Experimental Designs
Research methods that involve the manipulation of one or more variables to determine their effect on other variables, ideally with random assignment to treatment conditions.
Preexperimental Designs
Research designs that lack the rigor of true experimental setups, notably in the absence of a control group or random assignment.
Descriptive Laboratory Studies
Research experiments conducted in a controlled environment that aim to describe behaviors, functions, or processes.
Internal Validity
The extent to which a study accurately demonstrates a causal relationship between variables without being influenced by external factors.
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