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Why do strings vibrate??
The basic idea is that the fundamental constituents of reality are strings of the Planck length (about 10-33 cm) which vibrate at resonant frequencies. The http://www.wordiq.com/definition/Graviton (the proposed messenger particle of the gravitational force), for example, is predicted by the theory to be a string with wave amplitude zero. Another key insight provided by the theory is that no measurable differences can be detected between strings that wrap around dimensions smaller than themselves and those that move along larger dimensions (i.e., effects in a dimension of size R equal those whose size is 1/R). Singularities are avoided because the observed consequences of "big crunches" never reach zero size. In fact, should the universe begin a "big crunch" sort of process, string theory dictates that the universe could never be smaller than the size of a string, at which point it would actually begin expanding
http://www.wordiq.com/definition/Superstring_theory
This is a very significant physical result because it tells us that the energy of a system described by a harmonic oscillator potential cannot have zero energy. Physical systems such as atoms in a solid lattice or in polyatomic molecules in a gas cannot have zero energy even at absolute zero temperature. The energy of the ground vibrational state is often referred to as "zero point vibration". The zero point energy is sufficient to prevent liquid helium-4 from freezing at atmospheric pressure, no matter how low the temperature.
http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hosc4.html#c1
Fig. 1. In quantum chromodynamics, a confining flux tube forms between distant static charges. This leads to quark confinement - the potential energy between (in this case) a quark and an antiquark increases linearly with the distance between them.
http://www.cerncourier.com/main/article/40/7/16/1/cernexotic1_9-00
Strings move due to the vibrations caused by the energy from an external force, such as plucking or strumming. This energy causes the string to vibrate at a specific frequency, which produces sound waves that we can hear.
The frequency of string vibrations is affected by several factors, including the tension, length, and thickness of the string. A higher tension, shorter length, and thicker string will produce a higher frequency, while a lower tension, longer length, and thinner string will produce a lower frequency.
When a string vibrates, it creates sound waves that travel through the air and reach our ears. These sound waves are then interpreted by our brains as sound. The frequency and amplitude of the string's vibrations determine the pitch and volume of the sound produced.
The frequency and amplitude of a string's vibrations are determined by its properties, such as tension, length, and thickness. Therefore, different strings will produce different sounds because they have different properties, resulting in different frequencies and amplitudes of vibration.
Yes, string vibrations can be manipulated by changing the properties of the string, such as its tension, length, and thickness, or by using techniques like bending or muting. This allows musicians to produce different sounds and create a variety of tones and effects when playing stringed instruments.