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The tree will make a sound, even if nobody heard it, simply because it could have been heard. The answer to this question depends on the definition of sound. We can define sound as our perception of air vibrations. Therefore, sound does not exist if we do not hear it. When a tree falls, the motion disturbs the air and sends off air waves.
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Is the statement, "Yes, it obviously made a sound because all observed falling trees make a sound, and there is no detectable connection between the tree and the observer that affects sound production" equivalent to "Yes, we absolutely know it made a sound" —Preceding unsigned comment added by 65.96.163.148 15:11, 12 March 2010 (UTC)
Methods that establish the key for a particular piece can be complicated to explain and vary over music history. [citation needed] However, the chords most often used in a piece in a particular key are those that contain the notes in the corresponding scale, and conventional progressions of these chords, particularly cadences, orient the listener around the tonic.
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For example, V/V (pronounced "five of five") indicates the dominant chord of the dominant key of the present home-key. The dominant key of C major is G major so this secondary dominant is the chord of the fifth degree of the G major scale, which is D major (which can also be described as II relative to the key of C major, not to be confused ...
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How to Have More Energy: 7 Tips. This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Life can get incredibly busy, and keeping up often hinges on having enough energy.