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Mechanical Properties of Fluids
Question
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The top of lake is frozen. Air in contact is at temperature –10°C. What do you expect the temperature of water in contact with lower surface of ice and at the bottom of lake?

Answer

The temperature of water in contact with the lower surface of ice is 0°C and at the bottom of the lake is –4°C. This is the anomalous behaviour exhibited by water. The volume of the water molecules decreases as the temperature rises and expands as the pressure increases. 

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Some More Questions From Mechanical Properties of Fluids Chapter

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?

Are all the periodic motions simple harmonic?

Does the time period of particle vibrating in simple harmonic motion depend upon its displacement?

Where will the particle executing simple harmonic motion have acceleration maximum and speed zero?