Variability of MEGA Brands U.S.A. Gold #2 Pencil Lead Resistivity
Department
Chemistry
Major
Chemistry
Research Advisor
Gerald, Rex
Advisor's Department
Chemistry
Abstract
The purpose of this study was to determine if a relationship exists between resistivity and quality control methods of MEGA Brands Inc. for USA Gold #2 pencils. Voltage of eight sample pencils was initially determined by using a direct current electric circuit and 5 increasing distances along the length of the pencil. Resistance was calculated and graphed against the distance measurements. Linear graphs were produced from this data, with R-squared values between 0.9855 and 1.000, which indicated the data had a high goodness of fit to the linear model. The resistivity values were determined to be between 3.1485 x 10-4 and 4.8729 x 10-4Ω∙m, with an average of 3.88 x 10-4 Ω∙m ± 2.7805%. The resistivity of each sample pencil was very similar compared the other sample pencils tested which indicates a positive relationship is present with quality control of MEGA Brands Inc. MEGA Brands Inc. can potentially use resistivity determination of pencil core lead to analyze their composition and ensure that the pencils they make are similar and of the same high standard MEGA Brands Inc. expects.
Biography
Rachel Hendrix is a junior Chemistry major, Biological Sciences minor. Rachel is from St. Louis, MO and expects to graduate in December of 2016. She is an active club member of Women as Leaders and Habitat for Humanity.
Research Category
Sciences
Presentation Type
Poster Presentation
Document Type
Poster
Location
Upper Atrium/Hall
Presentation Date
15 Apr 2015, 9:00 am - 11:45 am
Variability of MEGA Brands U.S.A. Gold #2 Pencil Lead Resistivity
Upper Atrium/Hall
The purpose of this study was to determine if a relationship exists between resistivity and quality control methods of MEGA Brands Inc. for USA Gold #2 pencils. Voltage of eight sample pencils was initially determined by using a direct current electric circuit and 5 increasing distances along the length of the pencil. Resistance was calculated and graphed against the distance measurements. Linear graphs were produced from this data, with R-squared values between 0.9855 and 1.000, which indicated the data had a high goodness of fit to the linear model. The resistivity values were determined to be between 3.1485 x 10-4 and 4.8729 x 10-4Ω∙m, with an average of 3.88 x 10-4 Ω∙m ± 2.7805%. The resistivity of each sample pencil was very similar compared the other sample pencils tested which indicates a positive relationship is present with quality control of MEGA Brands Inc. MEGA Brands Inc. can potentially use resistivity determination of pencil core lead to analyze their composition and ensure that the pencils they make are similar and of the same high standard MEGA Brands Inc. expects.
