LabMeasurementsandErrorAnaly-1

LabMeasurementsandErrorAnaly-1 - MEASUREMENTS AND ERROR...

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Objective 1. To learn how to use the following measuring devices and understand the uncertainties associated with them. a) meter stick b) metric ruler c) triple-beam balance d) digital balance e) vernier calipers 2. Calculate the area and uncertainty of the table-top by measuring the dimensions with a meter stick 3. Calculate the density and its uncertainty of an aluminum metal block by measuring its dimensions with the metric ruler and the mass with the triple-beam balance. 4. Calculate the density and its uncertainty of an aluminum block by measuring its dimensions with the vernier calipers and digital balance. Theory Refer to lab handout on Error Propagation . Using the Metric Ruler Consider the following standard metric ruler. The ruler is incremented in units of centimeters (cm). The smallest scale division is a tenth of a centimeter or 1 mm. Therefore, the uncertainty x = smallest increment/2 = 1mm/2 = 0.5mm = 0.05cm. Note that a measurement made with this ruler must be stated to a tenth of a centimeter since the uncertainty is stated to a tenth of a centimeter. In the example above, the length of the object would be stated as x = 2.77 cm ± 0.05 cm. MEASUREMENTS AND ERROR ANALYSIS
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LabMeasurementsandErrorAnaly-1 - MEASUREMENTS AND ERROR...

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