Experiment 1- Chem - Chemistry 117-002 Erin Callahan and Kasie Coogan Experiment 1 Laboratory Basics Accuracy and Precision Introduction The purpose of

Experiment 1- Chem - Chemistry 117-002 Erin Callahan and...

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Chemistry 117-002 Erin Callahan and Kasie Coogan Experiment 1 – Laboratory Basics: Accuracy and Precision Introduction The purpose of this experiment is to explain and highlight the difference between accuracy and precision. Part A of the experiment is intended to explain the concepts of accuracy and precision, while Part B is supposed to move these concepts to a more traditional laboratory setting. Materials and Methods Part A: Nerf gun, Nerf bullets, white board, white board marker, yard stick Part B: Water, graduated cylinder, plastic tube, balance, graduated tube Experimental Procedures Part A: In this experiment, individuals shoot a Nerf gun at a target drawn on a white board. Each individual shoots three times, and each time measures with a yard stick and records the distance from the bull’s eye of the target to the ‘bullet.’ Next a circle is traced around the outside of the bullets with the smallest possible radius necessary to enclose all projectiles. The diameter of this circle is measured and recorded using the same yardstick used to record the distance. Each individual’s data is written on the board and compared in order to find the most accurate and most precise individuals. Then, the individuals are split into even groups. Four members from each group each take one shot next, and the
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  • Spring '16
  • Shane Cullian
  • Accuracy and precision, 0.1 ml, 0.625%, 0.1 mL, 7.5 cm, Erin Callahan

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