Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP27: Speed of Sound in Air 012-07000AAnalyzing the Data1. Transfer the trace of data from the Scope display.• In DataStudio, click the ‘Transfer Data’ button ( ) in the Scopetoolbar. Result: The data run appears under ‘Data’ in the Summary list.• In ScienceWorkshop, click the ‘Data Snapshot’ button ( ) in the Scopedisplay. Result: The ‘Enter Data Cache Information’ window opens.Enter a ‘Long Name’ and a ‘Short Name’. Enter‘volts’ as the Units. Result: A new data runappears in the Data list. Click ‘OK’ to return to theScope display.2. View the data in the Graph display.• In the DataStudio Graph display, select the run ofdata from the ‘Data menu’ ( ).Result: The Graph display shows the sound and itsecho.• In ScienceWorkshop, select ‘New Graph’ from theDisplay menu. Result: A Graph display opens. Select‘Data Cache, Speed of sound’ from the ‘Y-Axis Inputmenu’. Result: The Graph display shows the sound andits echo.3. Use the Graph displays built-in analysis tools to find the time between the first peak of thesound and the first peak of its echo. Calculate the speed of sound.• In DataStudio, use the ‘delta function’ of the Smart Tool ( ). Click and drag the cornerof the Smart Tool from the first peak of the sound to the first peak of the echo.• In ScienceWorkshop, use the ‘delta function’ of the Smart Cursor ( ). Click and dragthe Smart Cursor from the peak of the sound to the peak of the echo.Record your results in the Lab Report section.p. 196 ©1999 PASCO scientific P27
Name _____________________ Class ______________ Date _________Lab Report - Activity P27: Speed of Sound in AirWhat Do You Think?How can you use a Sound Sensor to measure the speed of sound in air?Data TableLength of Tube (m) Time (s) Speed of Sound (m/s)(Remember that the time from the first peak of the sound to the first peak of the echo is the‘round-trip’ time for the sound to go down-and-back in the tube.)Question1. How does your experimental value for the speed of sound compare to the accepted value of343 m/s for the speed of sound in air at a temperature of 20˚ C?P27 ©1999 PASCO scientific p. 197
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