PASCO WA-9495 Economy Resonance Tube - Manual (Page 2)

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E c o n o m y R e s o n a n c e T u b e W A - 9 4 9 5
2
The tube is driven by a speaker. The PASCO Open Speaker
(WA-9900) is recommended because it does not have a resonat-
ing box that would resonate at different frequencies from the
tube. The speaker can be driven by the Sine Wave Generator
(WA-9867) or other suitable function generator.
When the tube is driven at a resonant frequency, the sound is
louder.
Set-up
• Set up the equipment as illustrated in Figure 1 either with or
without the plug.
• If the plug is installed, it must be on the end of the inner tube
closest to the speaker (Figure 2a).
• Position the speaker at a 45° angle to the tube and several
centimeters from the end.
• To remove or replace the plug, push the inner tube all the
way in so it comes out at the speaker-end (Figure 3).
Figure 3: To remove or replace plug
Suggested Experiments
Constant Frequency, Variable Length
1. Set up the apparatus as a closed tube (with the plug), or an
open tube (without the plug). Push the inner tube all the way
in so that the resonating length is at its minimum.
2. Drive the speaker at a constant frequency.
3. Slowly increase the length of the tube. Note the lengths at
which resonance occurs.
Constant Length, Variable Frequency
1. Set up the apparatus as a closed tube (with the plug), or an
open tube (without the plug). If it is a closed, the resonating
length should be at least 50 cm.
2. Start driving the speaker at 50 Hz.
3. Slowly increase the frequency. Note the frequencies at which
resonance occurs.
Open and Closed Tubes
1. Do the constant-frequency experiment with a closed tube.
2. Repeat the experiment with the same frequency and an open
tube.
3. Find the relationship between the closed-tube and open-tube
resonant lengths.
Specifications
Technical Support
For assistance with any PASCO product, contact PASCO at:
Limited Warranty For a description of the product warranty, see the
PASCO catalog.
Copyright
The PASCO scientific 012-08340B Economy Resonance
Tube Instruction Sheet is copyrighted with all rights reserved. Permission
is granted to non-profit educational institutions for reproduction of any part
of this manual, providing the reproductions are used only in their laborato-
ries and classrooms, and are not sold for profit. Reproduction under any
other circumstances, without the written consent of PASCO scientific, is
prohibited.
Trademarks
PASCO, PASCO scientific, and Xplorer GLX are trade-
marks or registered trademarks of PASCO scientific, in the United States
and/or in other countries. All other brands, products, or service names are
or may be trademarks or service marks of, and are used to identify, prod-
ucts or services of, their respective owners. For more information visit
www.pasco.com/legal.
Outer tube length 1.3 m
Inner tube length 1.3 m
Diameter 0.15 m
Address: PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone: 916-786-3800 (worldwide)
800-772-8700 (U.S.)
Fax: (916) 786-7565
Web: www.pasco.com
Email: [email protected]