please help me answer questions 4, 5 and 6(a) and 6(b). thank you so much

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter1: Getting Started
Section: Chapter Questions
Problem 15PQ
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please help me answer questions 4, 5 and 6(a) and 6(b). thank you so much

A The smallest unit on a ruler is 1mm. Two students measured the width of a wooden
block and recorded them as 5.25 cm and 5.27 cm.Analyze the data gathered Are
these two equally precise? Comment.
5 Can measurements be accurate but not precise? Justify your answer by citing a
specific example.
6 Two students, John and Jay are given a small cylinder of aluminium of known mass and
asked to determine its density. (The 'accepted' density of aluminium is 2.702 g/cm)
Since density is mass/volume, the students need to calculate the volume of the cylinder
The height and diameter of the cylinder need to be measured in order to calculate its
volume
John is told to use a simple plastic ruler and to make four independent measurements
for each dimension. Jay is told to use a precision measuring tool called a micrometer.
John- plastic ruler
2.2 g/cm3
2.3 g/cm
2.7 g/cm3
2.4 g/cm3
Jay-micrometer
2.703 g/cm
2.701 g/cm
2.705 g/cm
5.811 g/cm
a. Which student's data is more accurate? Cite factor(s) that might affect the
measurement's accuracy.
b. Which student's data is more precise? Cite factor(s) that might affect the
measurement's precision.
15
Transcribed Image Text:A The smallest unit on a ruler is 1mm. Two students measured the width of a wooden block and recorded them as 5.25 cm and 5.27 cm.Analyze the data gathered Are these two equally precise? Comment. 5 Can measurements be accurate but not precise? Justify your answer by citing a specific example. 6 Two students, John and Jay are given a small cylinder of aluminium of known mass and asked to determine its density. (The 'accepted' density of aluminium is 2.702 g/cm) Since density is mass/volume, the students need to calculate the volume of the cylinder The height and diameter of the cylinder need to be measured in order to calculate its volume John is told to use a simple plastic ruler and to make four independent measurements for each dimension. Jay is told to use a precision measuring tool called a micrometer. John- plastic ruler 2.2 g/cm3 2.3 g/cm 2.7 g/cm3 2.4 g/cm3 Jay-micrometer 2.703 g/cm 2.701 g/cm 2.705 g/cm 5.811 g/cm a. Which student's data is more accurate? Cite factor(s) that might affect the measurement's accuracy. b. Which student's data is more precise? Cite factor(s) that might affect the measurement's precision. 15
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