Measurement Techniques

Measurement Techniques - Laboratory 1: Measurement...

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Laboratory 1: Measurement Techniques Course: PHYS 220 Spring 2010 Submitted by: Partner: Due Date: 1
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ABSTRACT: Lab 1 is designed to help understand how to measure and weigh with various measuring devices. The lab will also help to understand the error, uncertainty, standard deviation, and propagation error when measuring or weighing an object. To understand this we will measure or weigh the objects a repeated number of times according to the lab instructions. This lab will help give an ample understanding of how to measure and calculate based on a set number of tests or studies. This lab will also help in become more proficient at calculating uncertainty, standard deviation, and propagation error. Often, the uncertainty of a measurement is found by repeating the measurement enough times to get a good estimate of the standard deviation of the values. Then, any single value has an uncertainty equal to the standard deviation. However, if the values are averaged, then the mean measurement value has a much smaller uncertainty, equal to the standard error of the mean, which is the standard deviation divided by the square root of the number of measurements. PROCEDURES: Step 1. Measured the width and length of the laboratory tables using a meter stick. The uncertainty in measurement was calculated based on how many times the meter stick was used across the table. ±.2cm was calculated for the width because the meter stick was used four times across the width of the table. ±.05cm was multiplied times four which equals ±.2cm. ±.05cm was calculated for the length because the meter stick was used once across the length of the table. ±.05cm was established based on the increment that could be seen with the naked eye on a meter stick. Step 2. Measured the diameter and length of the specified cylinder with a caliper. The length and diameter were measured with a digital caliper and a venier caliper. ±.001cm was established based on the accuracy that could be measured with all the measuring devices used in this procedure. The calipers were not a calibrated device so the dimensions achieved were strictly reference only dimensions. Step 3.
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Measurement Techniques - Laboratory 1: Measurement...

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