Experiment 1: Rulers vs. CalipersIn this experiment, you will compare the precision and accuracy measuring the same objects with a ruler and a caliper.Materials1 MarbleRulerString (1) 8 oz. Styrofoam® CupVernier Caliper1 WasherProcedure1. Using the ruler, measure the diameter of the marble. Record your measurement in Table 1. 2. Indicate your uncertainty. Record the uncertainty in Table 1. 3. Repeat Steps 1 and 2 for the outer diameter of the washer, inner diameter of the washer, washer thickness, length of the string and the height of the Styrofoam® cup. 4. Repeat Steps 1 - 3 using a Vernier caliper. Table 1: Ruler and Caliper MeasurementsObjectRuler CaliperMeasurement(cm)Uncertainty(cm)Measurement(cm)Uncertainty(cm)Marble Diameter 1.00 cm +/- 0.050 cm 1.02 cm +/- 0.0025 cm Washer (Outer Diameter) 1.70 cm +/- 0.050 cm 1.92 cm +/- 0.0025 cm Washer (Inner Diameter) 0.80 cm +/- 0.050 cm 0.501 cm +/- 0.0025 cm Washer Thickness 0.10 cm +/- 0.050 cm 0.105 cm +/- 0.0025 cm String Length 12.4 cm +/- 0.050 cm 12.37 cm +/- 0.0025 cm Styrofoam® Cup Height 8.80 cm +/- 0.050 cm 8.68 cm +/- 0.0025 cm Post-Lab Questions© 2014 eScience Labs, LLC.All Rights Reserved1. Compare the measurements for objects using the ruler and caliper and write a general statement on when it is more beneficial to use a ruler rather than a caliper.2. Comment on accuracy vs. precision for rulers and calipers.The caliper has a much better accuracy than the ruler does. The measurement for the ruler is dependent on a person eyeballing the measurement, therefore not making it as accurate. The calipers however, place the object in between 2 clasps, and has 2 scales, making the measurement more precise. 3. What are the sources of uncertainty when using a ruler and caliper?© 2014 eScience Labs, LLC.All Rights
View Full Document
Unlocking...