What experience can show the peculiarity of the transfer of pressure by liquids and gases?

In fig. 100 a, shows a hollow ball with a water tube attached to it. Narrow holes are made in the ball. If, with the help of the piston, we begin to press on the water in the tube, then we will see that part of the water is pushed out of the ball in the form of identical streams that flow out of the holes. Having done the same with the smoke (Fig. 100 b), we will see identical plumes of smoke coming out of the holes. This confirms that gases and liquids transmit the pressure produced on them in all directions without change.

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