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Practice on Measuring Length and Processing Experiment Data. 11# 3016 Liu Xiaoyu. What we need to do in this experiment? To obtain the volume of a hollow cylinder and a sphere What measuring tools we can use ? A metal ruler, a vernier caliper & a micrometer

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## Practice on Measuring Length and Processing Experiment Data

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**Practice on Measuring Length and Processing Experiment Data**11# 3016 Liu Xiaoyu**What we need to do in this experiment?**To obtain the volume of a hollow cylinder and a sphere • What measuring tools we can use ? A metal ruler, a vernier caliper & a micrometer • Why we need to do such an experiment? 1. Know the correct use of the vernier caliper & the micrometer 2. Do some exercises for processing experiment data**1).Metal ruler**1.Introduction of tools**Parameters for a ruler:**Graduation value (i): defined as the value between two closed graduation marks. Instrument error ( ): defined as half of the graduation value.**Parameters for a vernier caliper:**Graduation value: defined as i=a/n. Instrument error: same value as the graduation value. Rules for reading: L=L0+ki**Parameters for a micrometer:**Graduation value: also can be defined as i=a/n Instrument error: half of the graduation value. Rules for reading: The final result = the reading – the original reading**2. Experiment data**1) Height of the hollow cylinder (measured by the metal ruler)mm**2). Outside & inside diameter of the hollow cylinder**(measured by the vernier caliper) mm**3.Data processing**1). Volume of the hollow cylinder

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