Examlex
Subtract the radical expressions. Assume that all variables represent positive real numbers.
Experiment
A research method involving the manipulation of one or more independent variables to determine their effect on a dependent variable, within a controlled environment.
Control Group
A group in an experiment that does not receive the treatment and is used as a benchmark to measure how the other tested groups do.
Caffeine
A stimulant commonly found in coffee, tea, chocolate, and some medications, affecting the central nervous system.
Reaction Time
The time it takes for an individual to respond to stimuli, reflecting the speed of processing information and executing a response.
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