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J. Perelman
"Entertaining physics". Book 2.
Chapter 6. Properties of liquids and gases

WHAT IS THE WEIGHT OF WATER IN THE TILTED GLASS?

"Nothing, of course, does not weigh in this glass of water is not kept, poured, " you say.

- And if not results? - I will ask. - What then?

In fact, it is possible after all to hold water in a tilted the glass so that it is not poured. This case is depicted in the figure. Tilted glass glass, tied at the bottom to one Cup of scales, filled with water, which comes as the edge of the glass is immersed in a container of water. On another Cup of scales put the same empty glass.

What kind of Cup weights will pull?


Which Cup will you pull?

Drag and drop the bound overturned a glass of water. This glass feels on top of the full atmospheric pressure, bottom same - atmospheric pressure, weakened weight contained in a glass of water. For the balance of cups needed to fill a glass of water, placed in another Cup.

Under these conditions, therefore, the water in the tilted glass weighs the same as in put on the bottom.

Entertaining physics J. Perelman

 




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