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Mechanical Properties of Fluids
Question
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What are resonant vibrations?

Answer

Resonant vibrations is the phenomenon of producing vibratory motion in a body by external period force.
The frequency of the vibrating body is same as that of the natural frequency of the body and this condition is called as resonance. 
The vibrations are called as resonant vibrations. 

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Some More Questions From Mechanical Properties of Fluids Chapter

What is the condition for motion to be simple harmonic motion?

In the displacement equation y = r sin(ωt/ + ϕ) what does ϕ called and what information does it give?

What determines the natural frequency of an oscillator?

Is there any relation between uniform circular motion and simple harmonic motion?

What is periodic motion?

Write down the expression for the instantaneous velocity and acceleration of particle vibrating in simple harmonic motion.

How do you define the mean position of particle executing simple harmonic motion?

Define amplitude.

What is the net displacement of the particle executing simple harmonic motion in one complete oscillation?