IB Prized Writing Sevenoaks School IB Prized Writing 2014 | Page 36

Robert Cinca - Physics Part 3: Excel Modeling Part Part 3: 3: Excel Excel Modeling Modeling In the second part of my project I attempted to create a model for my experimental In the second part my project I attempted create a model my to experimental results. In order to of create the model (as seen to part 3.2), I first for had collect some In the second part of my project I attempted to in create a model for my experimental results. to create the filament model (as seen which in part 3.2), cover I first had to collect data on In the order properties of the bulbs, I shall part 3.1. some results. In order to create the model (as seen in part 3.2), I first in had to collect some data on the properties of the filament bulbs, which I shall cover in part 3.1. data on the properties of the filament bulbs, which I shall cover in part 3.1. Part 3.1: Measuring the Properties of the Filament Bulbs Part Part 3.1: 3.1: Measuring Measuring the the Properties Properties of of the the Filament Filament Bulbs Bulbs In this section, I measured the following properties of the filament bulbs: In this section, I measured the following properties of the filament bulbs: In this I measured following properties of the filament bulbs:  section, The number of turns the of the filament  The number of turns area of the cross-sectional of filament the filament  The number of turns of the filament  The thickness cross-sectional the filament of the area wire of  The cross-sectional area of the filament  The thickness of the length of the wire wire  The thickness of the wire  The length of the wire How the resistivity of  The length of the wire tungsten varies with temperature.  How the resistivity of tungsten with temperature. The Internal Resistance of the varies PowerPack  How the resistivity of tungsten varies with temperature.  The Internal Resistance of the PowerPack  The Internal Resistance of the PowerPack In order to measure the dimensions of each filament, I went to the biology In order to measure the use dimensions of each filament, which I went to the department in order to one of their microscopes, the biology ability to take In order to measure the dimensions of each filament, I went had to the biology department in order to use one of their microscopes, which had the ability to take pictures at a in very zoomed-in level. department order to use one of their microscopes, which had the ability to take pictures at a very zoomed-in level. pictures at a very in zoomed-in level. I noticed that it was really hard to take any On first zooming on the filament, On first zooming in on the the filament, I noticed that it was really to take any measurements image appeared to be blurry. The hard problem was caused On first zooming because in on the filament, I noticed that it was really hard to take any measurements because the image appeared to be blurry. problem caused by refraction from the filament’s protective outer glass. The The solution was was to break the measurements because the image appeared to be blurry. The problem was caused by refraction from the filament’s protective glass. solution was to break the glass. Immediately, it became much easier outer to work out The all the measurements by refraction from the filament’s protective outer glass. The solution was to break the glass. Immediately, it became much easier to work out all the measurements needed. glass. Immediately, it became much easier to work out all the measurements needed. needed. How I measured the number of turns of the filament How I measured the number of turns of the filament How I measured the number of turns of the filament Due to the 3D aspect of the filament, I counted the number of turns by taking two Due to the aspect of the filament, the number of turns by taking two pictures (as 3D seen in Figures 10&11): I I counted Due to the 3D aspect of the filament, counted the number of turns by taking two pictures (as seen in Figures 10&11): pictures (as seen in Figures 10&11): Figures 10&11: Counting the Number of Turns in the Filament Figures 10&11: Counting the Number of Turns in the Filament Figures 10&11: Counting the Number of Turns in the Filament 35 17 17 17