Experiment 1 Rulers vs Calipers In this experiment you will compare the precision and accuracy measuring the same objects with a ruler and a caliper Materials 1 Marble Ruler String 1 8 oz Styrofoam Cup Vernier Caliper 1 Washer Procedure 1 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 Measurements Ruler Object Marble Diameter Measurement cm Uncertainty cm Caliper Measurement cm Uncertainty cm 1 3 0 1 1 402 0 001 Washer Outer Diameter 1 9 0 1 1 90 01 Washer Inner Diameter 0 80 0 1 0 80 01 Washer Thickness 0 1 0 1 0 106 001 String Length 609 6 0 1 609 6 0 01 2014 eScience Labs LLC All Rights Reserved Styrofoam Cup Height 8 9 0 1 8 9 0 01 Post Lab Questions 1 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 3 What are the sources of uncertainty when using a ruler and caliper 2014 eScience Labs LLC All Rights Reserved
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