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Damping and Resonance
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Natural frequency
Frequency of the system when there is no external force or forces acting on it
Damping
The decrease of amplitude of an oscillating system
A condition that causes an oscillating system to experience damping
When its energy is lost to the surroundings as heat energy
Internal damping
An oscillating system loses energy due to the extension and compression of the molecules in the system
External damping
An oscillating system loses energy to overcome frictional force or air resistance that act on it
Force oscillation
Oscillation with the help of external force or forces
Resonance
In a force oscillation, if the frequency of the external force is equal to the natural frequency of the system, the system will oscillates with maximum amplitude
Applications of resonance
To tune radio or television
The uses of Barton's pendulum system
Can demonstrate the characteristic of resonance
Example of Resonance
Opera singer breaks a wine glass with her voice
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