Title

Variability of MEGA Brands U.S.A. Gold #2 Pencil Lead Resistivity

Presenter Information

Rachel Hendrix

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

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Apr 15th, 9:00 AM Apr 15th, 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.