... plucked and the applied frequency equals its natural frequency then resonance occurs. The resonant frequency of a string can be increased by: * Shortening the length * Increasing the tension * Using a lighter string Variables and Constants The experiment is basically concerned with the effect that the tension will have on the frequency and amplitude. Therefore, the basic variable will be the tension of the string. The constant in this case would be the thickness of the string, as it will not be changed. This should ensure that the experiment is fairly accurate as its thickness can affect the resonance. Application of Principles The principles of frequency, resonance and amplitude are largely applied in many engineering projects. The understanding of the above principle is vital to ensure that bridges are safe to travel on. They are applied in musical instruments to make sounds of varying frequencies, loudness and pitch. Eco-sounding, which uses the understating of frequency, is used to locate ...

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