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Longitudinal Vibrations of a Helical Spring

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the standing waves will be demonstrated on an elastic
spiral in longitudinal motion
the that the
spring in the form of a spiral is projected on evidence is fixed the
other is attached to the vibrator of a
doorbell and can thus be moved longitudinally through the proper choice of the length of the spring a standing wave has been produced nodes and nodes of the motion can be clearly this
the the the the
the the the
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Title Longitudinal Vibrations of a Helical Spring
Alternative Title Longitudinale Schwingung einer Spiralfeder
Title of Series The Physics Experiments of Robert Wichard Pohl (1884 - 1976)
Number of Parts 62
Author Lüders, Klaus
Pohl, Robert Otto
Beuermann, Gustav
Samwer, Konrad
Contributors Stickan, Walter (Redaktion)
Lechner, Kuno (Kamera)
Gerstenberg, Thomas (Ton)
Yousefpour, Abbas (Schnitt)
License CC Attribution - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.3203/IWF/C-14836eng
IWF Signature C 14836
Publisher IWF (Göttingen)
Release Date 2003
Language English
Producer IWF (Göttingen)
Production Year 2002

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IWF Technical Data Video-Clip ; F, 49 sec

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Subject Area Physics
Abstract Longitudinal standing waves can be excited on helical springs. Through optical projection, nodes and antinodes are made visible. A horizontally mounted small helical spring is projected onto the wall of the lecture hall. A standing longitudinal wave is excited by driving one of its ends with a door bell vibrating at one of the normal mode frequencies of the spring. In the projection, the nodes and antinodes of the longitudinal vibration are easily seen: In the nodes, the sections of the spring are motionless and thus clearly imaged, while in the antinodes they appear fuzzy.
Keywords acoustics
helical springs
longitudinal vibrations
normal modes
standing waves

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