Essay about Lab 1-Measurement, Length, Mass, Volume, Density & Time

1380 WordsMar 19, 20156 Pages
GS104 Lab Report Experiment # 1 Measurement, Length, Mass, Volume, Density & Time David Case: January 17, 2015 Experiment #1 Measurement, Length, Mass, Volume, Density, & Time Objectives: To make basic distance, mass, density, and time measurements. To make calculations of volume and density, using proper units, and to practice using graphing software while graphing the relationship between the circumference of a circle and its diameter. Materials: stopwatch meter tape 3 rectangular objects metric ruler pencils metal bolt 500‐G scale graduated cylinder five circular objects Lab Notes: 1. Estimation of Various…show more content…
By having the length, width, and height measurements off by a little, the volume would be off by a huge amount. A small error in the hand measurements would grow by leaps and bounds in measuring volume. 3. Graphing data and the determination of π In this experiment, I measured 5 round objects of varying sizes. The objects I selected are a cup, a bowl, a soda can, a babies rattle, a CD. Object Diameter (cm) Circumference (cm) Cup 7 22 Bowl 14 48 Can 6 21 Rattle 5 18 CD 12 38 Question: What is the slope of “C vs d” line? What does it represent? The slope of the “C vs d” line, according to the above graph, is 3.2548. This represents a ratio between the circumference and the diameter of a round object. Being that I used imprecise measuring devices my measurements are a little off. Although my ratio seems consistent in my graph. With a more accurate measuring device my measurement would be closer to π. G. Percentage error formula: Percentage error = π = 3.14 Estimate = 3.2548 3.14-3.2548/3.14 = ‐0.0365 x ‐1 = 0.0365 x 100% = 3.65% My percent of error is 3.65%. 4 Density Measurements: determine the density of a metal bolt by water‐displacement method: A, B & C: For this experiment first I weighed a metal bolt using a digital scale, getting a weight of 7.8 g. Then I filled the graduated cylinder with water to 10-mL. Next I placed the metal bolt into the cylinder and recorded the new volume. This reading was 12-mL.
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