23._Звучни_вилушки.ogv
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Summary
Description 23. Звучни виљушки.ogv |
Македонски:
Опит со две звучни виљушки кои осцилираат на еднакви
честоти
. Едната виљушка се удира со гумено чеканче. Иако првата виљушка не е удрена, другата виљушка видно трепери поради осцилацијата предизвикана од периодичната промена на притисокот и густината на воздухот со удирањето на другата виљушка, создавајќи звучна резонанција меѓу виљушките. Меѓутоа, ако на еден крак на виљушките се додаде парче метал и се поместува, тоа дава сè послаба резонанција и звукот не се пренесува делотворно. Извел: проф. Оливер Зајков. Институт за физика на Природно-математичкиот факултет во Скопје.
English:
Experiment using two
tuning forks
oscillating at the same frequency. One of the forks is being hit with a rubberised mallet. Although the second tuning fork hasn't been hit, it becomes visibly and audibly excited due to the oscillation caused by the periodic change in the pressure and density of the air originally caused by hitting the first fork, creating an
acoustic resonance
between the forks. However, if we attach a weight to one of the prongs of the second tuning fork, we see that the effect dampens, and the excitations become less pronounced as resonance isn't achieved as effectively. Performed by Prof. Oliver Zajkov at the Physics Institute at the
Ss. Cyril and Methodius University of Skopje
, Macedonia.
Français :
Différentes démonstrations impliquant des
diapasons
de même
fréquence
. Ainsi, lorsque l'un est frappé avec un marteau en caoutchouc, l'autre est entraîné par
résonance acoustique
engendrée par la vibration de l'air créée par le premier. Cependant, si un poids est attaché à l'une des branches de l'un des diapasons, la fréquence de celui-ci change et sa résonance en est considérablement réduite. Cependant, lorsque les deux diapasons sont frappés selon cette configuration, un
battement
apparaît.
Expérience réalisée et expliquée par le professeur Oliver Zajkov de l'Institut de physique de l' université Saints-Cyrille-et-Méthode de Skopje de Macédoine. |
Date | |
Source | Own work |
Author | Andrejdam |
This video was taken during
Wikiexperiments 2015
set up by
Shared Knowledge
.
You can see all videos in category Physics Wikiexperiments . |
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