Blocks Length (cm) Length (in) Ratio (cm/in) #1 7.6 3.0 # 2 # 3 12.5 5.0 19.0 7.3 Mean % Error

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter1: Getting Started
Section1.7: Error And Significant Figures
Problem 1.6CE: How many significant figures does each number have? If the number is exact or if the number of...
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Length Measurements
The lengths of three woodblocks is measured one at a time, in çentimeters and
inches, and mecasurement values are recorded in the respective row and column in
the Data Table 3. Then the ratios of the lengths in centimeters to inches is
calculated by dividing cm values in the second column to the inch values in the
third column, and values entered in the last ratio (cm/in) column. The mpan of
the three ratios, which should be near the standard (2.54 cm/inch), is
determined. Finally, the percent error of the measurements is calculated using
the formulae given below.
% Error =*/Standard value– observed mean/x 100
Standard value
*absolute difference (no negative sign)
able 3. Length Measurements
Length (in)
Ratio (cm/in)
Length (cm)
7.6
Blocks
12.5
て#
7.3
Mean
% Error
Transcribed Image Text:Length Measurements The lengths of three woodblocks is measured one at a time, in çentimeters and inches, and mecasurement values are recorded in the respective row and column in the Data Table 3. Then the ratios of the lengths in centimeters to inches is calculated by dividing cm values in the second column to the inch values in the third column, and values entered in the last ratio (cm/in) column. The mpan of the three ratios, which should be near the standard (2.54 cm/inch), is determined. Finally, the percent error of the measurements is calculated using the formulae given below. % Error =*/Standard value– observed mean/x 100 Standard value *absolute difference (no negative sign) able 3. Length Measurements Length (in) Ratio (cm/in) Length (cm) 7.6 Blocks 12.5 て# 7.3 Mean % Error
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