Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP28: Interference of Sound Waves – Beats 012-07000APART III: Data Recording1. Start monitoring data.• Hint: In DataStudio, click the Start button ( ).• Hint: In ScienceWorkshop, click the MON button ( ).• The Scope should display a waveform somewhat like the examples shown here.• Notice that the sweep speed is set to 10.00 ms/div, and that the sensitivity is set to 0.200v/div. Notice also that the trigger level is set to match the maximum amplitude of thewaveform.2. Adjust the Scope controls as necessary in order to display your waveform.3. Click the STOP button to stop monitoring data.p. 204 ©1999 PASCO scientific P28
Name _____________________ Class ______________ Date _________Analyzing the Data1. Use the Scope display’s built-in analysis tool to find the time (or period) from onemaximum amplitude to the next. Record the time in the Lab Report section.• Hint: In DataStudio, click the Smart Tool button ( ). Move the Smart Tool to the firstpoint of maximum amplitude on the Scope display. Use the “delta” feature of the SmartTool to find the time to the next maximum amplitude. To use the “delta” feature, move thecursor toward a corner of the Smart Tool until the cursor changes to a “∆” shape. Move the“∆” shaped cursor to the next maximum. Record the time.Deltafeature• Hint: In ScienceWorkshop, click the Smart Cursor button ( ) and move the cursor to thefirst point of maximum amplitude on the Scope display. Use the “delta” feature of theSmart Cursor to find the time to the next maximum amplitude. To use the “delta” feature,hold down the mouse button as you move the cursor. Record the time.• The next task is to find the frequency of each individual tone:2. Turn off the signal from GENERATOR 2 on the DualFunction Generator by moving the third switch in theSUMMING AMPLIFIER from IN to OUT. Theremaining tone is coming from GENERATOR 1alone.3. Set up the FFT display.• Hint: In DataStudio, click the Window menu and selectFFT1 from the list.• Hint: In ScienceWorkshop, click the Display menu andselect Frequency Spectrum from the end of the menu.4. Start monitoring data from GENERATOR 1.5. Hint: Click the Start button in DataStudio or click theMON button in ScienceWorkshop.• The FFT (Frequency Spectrum) display will show thefundamental frequency of the signal fromGENERATOR 1.OUTINPUTGNDGAINMIC PRE-AMPSUMMINGAMPLIFIEROUT INMove the thirdswitch from IN toOUT8 ΩVOLUME OUTGNDP28 ©1999 PASCO scientific p. 205
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