Question 10
Wear safety goggles. Connect two transparent syringes of the same size with plastic tubing, without gaps. Partly fill one syringe with water, remove air bubbles, and leave a space between its piston and the water. Raise the empty syringe's piston to leave space inside. Hold both outlets downwards, with the water-filled syringe lower than the empty one. Press the empty syringe's piston down slowly and steadily. Observe the other piston. Place a lightweight object on the water-filled syringe's piston and continue pressing.

Why was it possible to lift the object when pressure was applied to the empty syringe?

Why was it possible to lift the object when pressure was applied to the empty syringe?
