Physics I Lab Manual 2011 25

Physics I Lab Manual 2011 25 - in this value Express your...

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EXPERIMENT 2. MEASUREMENT AND PRECISION 1. If the length of the paper is measured twice using a ruler marked with 1mm increments, and the measurements give values of l=298 mm and l=294 mm, what value should be used for l ? for δl ? Express your answer in the form l ± δl 2. If the width of the paper is also measured twice using a ruler marked with 1mm incre- ments to give a value of w =210 mm both times, what value should be used for w ? for δw ? Express your answer in the form w ± δw 3. What is the area of the paper? What is the uncertainty in the area? Express your answer in the form A ± δA . 4. What is the value for the perimeter of the paper ( p = 2 l +2 w )? What is the uncertainty
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Unformatted text preview: in this value? Express your answer in the form p ± δp . Procedure Work in groups of two. Each student will measure the diameter and the circumference of each provided plexiglas disk several times. The group results will be recorded in a table similar to the one shown on the next page. Draw your own data table. Make sure it has a descriptive title and contains units in the headers of the appropriate columns or after each data value. Analysis 1. For each measurement of circumference ( c ) and diameter ( d ), determine the value of π by taking the ratio c / d . Since both c and d have uncertainty in their measurements, 15...
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