100 50 0 0 m Figure 2.The relation between fundamental frequency fand length ofthe string s ALTERNATIVE RESEARCHPROJECT 1.Measure the fundamental frequency of a 100-cm string that is fixed at both ends under 80-newton tension. 2.Investigate the relation between fundamental frequency and the length of the string 3.Investigate the relation between fundamental frequency and the tension in the string. APPARATUS Sonometer,No.41401; Precise dynamometer,No.314201; Forked-type Infrared photogate,No.33746; Sensor element,No.524010; Timerbox,No.524034: Base,No.00041; Spacer; Gassy Leb computermeasurementand data analysis system EXPERIMENT TIPS 1.Read experimental introduction booklet carefully or refer to experimental reports with the goal of being familiar with basic requirements and experimentalprocedure. 2.Read the manualofrelated experimentalapparatus. 3.Read the manual of Gassy Leb computer measurement and data analysis system.Refer to online document fora more detailed usage of Gassy Leb. 4.Tum on the computer,and open experimental document in file C:\Data to learn how to set the experiment parametersand howthe experiment data displays. 5.Create a private file named after your student number for your group in C:\StuData.Order all related experimental documents and save them in the file of your group,and create a text named afteryour name to record related experimental information. 6.Click 'Gassy Leb'icon to open the program,and click 'set'to open the window of experiment setting.Select Timer Box'icon to open the window of Timber Box setting,and choose 'quantity'and click 'frequency'.Click the Measurement Parameter'button to openFigure 2. The relation between fundamentalfrequency f and length of the string s ALTERNATIVE RESEARCH PROJECT 1. Measure the fundamental frequency of a 100-cm string that is fixed at both ends under 80-newton tension. 2. Investigate the relation between fundamental frequency and the length of the string. 3. Investigate the relation between fundamental frequency and the tension in the string. APPARATUS Sonometer, No.41401; Precise dynamometer, No. 314201； Forked-type Infrared photogate, No. 33746; Sensor element, No.524010; Timerbox, No.524034; Base, No. 00041; Spacer; Gassy Leb computer measurement and data analysissystem. EXPERIMENT TIPS 1. Read experimental introduction booklet carefully or refer to experimental reports with the goal of being familiar with basic requirements and experimental procedure. 2. Read the manual of related experimental apparatus. 3. Read the manual of Gassy Leb computer measurement and data analysis system. Refer to online document for a more detailed usage of Gassy Leb. 4. Turn on the computer, and open experimental document in file C:\Data to learn how to set the experiment parameters and how the experiment data displays. 5. Create a private file named after your student number for your group in C:\StuData. Order all related experimental documents and save them in the file of your group, and create a text named after your name to record related experimental information. 6. Click ‘Gassy Leb’ icon to open the program, and click ‘set’ to open the window of experiment setting. Select ‘Timer Box’ icon to open the window of Timber Box setting, and choose ‘quantity’ and click ‘frequency’. Click the ‘Measurement Parameter’ button to open