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Mechanical Properties of Fluids
Question
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Explain why ventilators are provided in the room near the ceiling?

Answer

In rooms, the ventilators are provided at the top near the ceiling because the air in the room gets warmer due to respiration of people present in the room.
Warm air being lighter goes up. It will exhaust out from the room if ventilators are made at the top of the room near the ceiling. 

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Some More Questions From Mechanical Properties of Fluids Chapter

Define frequency.

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.