Significant figures prelab

# Significant figures prelab - Significant figures Prelab...

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Significant figures Prelab worksheet Name___Taylor Rousseau ______ Date____September 15, 2016____ Section___550____ 1) Why do we call measured numbers inexact numbers? Has a value with some error or uncertainty associated with it. All measured values have inherent error- a defective measuring device, or a deformed plastic cup used to measure ingredients for a recipe. Improper calibration of the measuring device i.e. a bathroom scale that has not been set to zero before making a weighing or the skill level of the person performing the measurement. Consider a lab technician who has done the same experiment once a day for the last 25 years of his/her career vs. a college student. The markings on the measuring device- how were the markings determined for a given ruler graduated in 16ths of an inch? Are they really a 16th of an inch? There is always some uncertainty present when a measurement is being made. Therefore, it is impossible to make an exact measurement. Anytime a measurement is made, the result will be an inexact number.

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• Spring '14
• AllenH.Redmon
• Scientific Notation, nonzero digits, numbers inexact numbers, Name___Taylor Rousseau ______

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