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In practical experiments, duration refers to the total time over which an activity, observation, or measurement is carried out. Accurately recording duration is essential as it affects the reliability and validity of the results. In laboratory settings, duration can determine reaction times, process completion, or the effect of time-dependent variables on the experiment. For example, ______ _____ ________ _______ _______ ____ ________ _______ __________ _________ ___ _________.
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