# physics

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Which of the following statements is not true about resonance?

It is easy to get an object to vibrate at its resonant frequencies but difficult to get it vibrate at other frequencies.

A simple pendulum has many resonant frequencies called harmonics.

A spring-mass system has only a single resonant frequency.

Vibrating strings and air-columns have many resonant frequencies called harmonics.

• physics -

not true: A simple pendulum has many resonant frequencies called harmonics.

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