The figure above is from a classic 1920 physics textbook by Millikan and Gale. I

Question

The figure above is from a classic 1920 physics textbook by Millikan and Gale. It represents a method for raising the water from the pond up to the water tower, at a higher level, without using a pump. Water is allowed into the drive pipe, and once it is flowing fast enough, it forces the valve at the bottom closed.

Explain how this works in terms of conservation of mass and energy.

The figure above is from a classic 1920 physics textbook by Millikan and Gale. It represents a method for raising the water from the pond up to the water tower, at a higher level, without using a pump. Water is allowed into the drive pipe, and once it is flowing fast enough, it forces the valve at the bottom closed. Explain how this works in terms of conservation of mass and energy.

Explanation / Answer

Water Flowing at some speed contains Kinetic energy. When the speed of the water at the bottom is fast enough that is Kinetic energy of the water at the bottom is enough to take the water to the height of tower. So here the Kinetic energy of water is getting converted into Potential energy.

Also Conservation of mass is being followed since no water getting lost in the process.

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