Explore Download 0CommentLinkEmbedof 6Readcast0 inShare Xavier Bourret-Sicotte Physics18/09/2007 Measuring the speed of sound In this experiment, we will measure the speed of sound. The apparatus consisted of a plastic tube filled with water linked to a water container. Thiscontainer could be displaced vertically in order to change the water level. We would thenmake a tuning fork vibrate above the pipe and change the water level until the resonance wasat maximum intensity. Hypothesis: The velocity of sound is 330 ms -1 , the relationship between velocity, frequencyand wavelength is represented by the formula v= ? , 1) Raw data presented Table 1 Table 1 shows the frequency of the different tuning forks and the length of air needed for maximum resonance. The error on the length was estimated to 0. 1 cm as we repeated eachexperiment several times. Note the error on the forks’ frequencies is a mere estimation as theyare accurately calibrated during manufacture. Frequency /HzLength /m 512. 00. 157480. 00. 169456. 10. 178426. 60. 192406. 40. 202384. 00. 215362. 00. 226341. 30. 243320. 00. 260304. 40. 270288. 00. 288271. 20. 308256. 00. 323Error +/- 0. 1error +/- 0. 001 2) Data analysis and interpretation
During the experiment, we have created a fundamental standing wave between the surface of the water and the opening of the pipe. The distance measured represents ? of the completestanding wave therefore ? = measured length * 4-From the general formula v= ?? , we find that velocity of sound in ms -1 for the first tuningfork experimented is v = 512 ? 0. 157 ? 4 = 321. 536-Calculating the error for velocity: ? v = ( ?? / ? + ?? / ? ) ? vFor the first tuning fork: ? v = (0. 001 / 0. 157+0. 1/512) ? 321. 536 ? v = 2. 1108 ms -1 ? v ? 2 ms -1 ? v ? 322 +/- 2 ms -1 To find the mean velocity we add all values of v and divide the sum by the number of values. A similar process was completed for the mean ? v. Results of all processed data are shown in table 2 Table 2 Frequency Hz -1 Length m -1 Velocity ms -1 ? velocity +/- ms -1 512. 00. 1573222480. 00. 1693242456. 10. 1783252426. 60. 1923282406. 40. 2023282384. 00. 2153302362. 00. 2263271341. 30. 2433321320. 00. 2603331304. 40. 2703291288. 00. 2883321271. 20. 3083341256. 00. 3233311error +/- 0. 1error +/- 0. 001 Mean velocity = (322+324+325+328…) / 13 ? 329Mean ? v = (2+2+2+2+2+2+1+1+1…)/13 ? +/- 2 ms -1 As v = ?? , and ? = v / ? , let be constant of 330 ms -1 then ? ? 1/ ? By plotting the graph of Frequency over 1/ ? we obtain a straight line. The gradient of thisline represents the constant v and the y-intercept a systematic error. The situation is illustrated by graph 1 Graph 1 y = 313. 24x + 16. 736200. 0250. 0300. 0350. 0400. 0450. 0500. 0550. 00. 55 0. 75 0. 95 1. 15 1. 35 1. 55 1. 75 1/wavelength m-1 Note that if we add the y-intercept to the gradient we obtain the value of 329. 976 ms -1 for thespeed of sound. Moreover, the second best fit line (in red) illustrates the most extreme interpretation of the Speed of Sound IB Physics HL Lab report
Physics HL coursework 2008Grade 7 Download or Print Add To Collection 8. 4K READS 18 READCASTS 1 EMBED VIEWS Published by xb08 Follow Search TIP Press ? F to search anywhere in the document. Info and Rating Category:School Work > Essays & Theses Rating: Upload Date:09/20/2010 Copyright:Attribution Non-commercial Tags: Lab Reportspeed of soundib physics hl Free download as PDF File (. pdf), Word Doc (. doc), Text File (. txt) or read online for free. Flag document for inapproriate content Download and print this document Choose a format to download in .PDF. DOC. TXT Download More From This User 4 p. Eco Q1 V5 xb08 5 Reads 11 p. The Radio Report xb08 48 Reads 6 p. Palm Jumeirah project management report xb08 780 Reads Next Recommended 8 p. Speed of Sound Physics Lab Report hankschmidt 7472 Reads 7 p. Simple Pendulum Lab sagarchester 91725 Reads 9 p. Speed of Sound Lab Will Guo 1126 Reads Next Leave a Comment You must be logged in to leave a comment. Submit Characters: 400 About About Scribd Blog Join our team! Contact Us Premium Premium Reader Scribd Store Advertise with us Get started AdChoices Support Help FAQ Press Partners Publishers Developers / API Legal Terms Privacy Copyright © Copyright 2012 Scribd Inc. Language:English
