PHYSIC 181 Lecture Notes - Lecture 11: Graduated Cylinder, Propagation Of Uncertainty, Tap Water
6 Jan 2018
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Document Summary
The purpose of this lab is to determine the density of water using two dimensional linear statistics (2dstats). We aim to understand linear regression, error propagation and the use of graphs. At 200c and normal pressure, the accepted value for the density of water is acc = 0. 99823 g/ml. We will be adding a mass of water inside a graduated cylinder and measuring the corresponding volume. When handling water in this way, we will encounter two experimental challenges: trying to add arbitrarily small drops of water and encountering a meniscus. Due to surface tension, there is a minimum amount of water you will be able to add at any given time. When using an eyedropper, as you try to remove a little bit of water from the large quantity, the water will start forming a sphere that will resist being separated into smaller spheres. In short, it is difficult to add, for example, 1. 32 drops of water with the eyedropper.
