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2. Drop (liquid) - Wikipedia

   en.wikipedia.org/wiki/Drop_(liquid)

   Water drops on a leaf A water drop falling from a tap. A drop or droplet is a small column of liquid, bounded completely or almost completely by free surfaces.A drop may form when liquid accumulates at the end of a tube or other surface boundary, producing a hanging drop called a pendant drop.

3. Chinese water torture - Wikipedia

   en.wikipedia.org/wiki/Chinese_water_torture

   Chinese water torture, or use of a dripping machine, [1] is a mentally painful process in which cold water is slowly dripped onto the scalp, forehead or face for a prolonged period of time. [1] The process causes fear and mental deterioration of the subject.

4. Heat trap - Wikipedia

   en.wikipedia.org/wiki/Heat_trap

   Heat traps are valves or loops of pipe on the cold water inlet and hot water outlet of water heaters. The heat traps allow cold water to flow into the water heater tank, but prevent unwanted natural convection and heated water to flow out of the tank. [1] [2] Newer water heaters have built-in heat traps.

5. Splash (fluid mechanics) - Wikipedia

   en.wikipedia.org/wiki/Splash_(fluid_mechanics)

   Slow motion video of a fruit falling into water. In fluid mechanics, a splash is a sudden disturbance to the otherwise quiescent free surface of a liquid (usually water).The disturbance is typically caused by a solid object suddenly hitting the surface, although splashes can occur in which moving liquid supplies the energy.

6. Leidenfrost effect - Wikipedia

   en.wikipedia.org/wiki/Leidenfrost_effect

   Leidenfrost droplet Demonstration of the Leidenfrost effect Leidenfrost effect of a single drop of water. The Leidenfrost effect is a physical phenomenon in which a liquid, close to a solid surface of another body that is significantly hotter than the liquid's boiling point, produces an insulating vapor layer that keeps the liquid from boiling rapidly.

7. Drop impact - Wikipedia

   en.wikipedia.org/wiki/Drop_impact

   A drop striking a liquid surface; in this case, both the drop and the surface are water. In fluid dynamics, drop impact occurs when a drop of liquid strikes a solid or liquid surface. The resulting outcome depends on the properties of the drop, the surface, and the surrounding fluid, which is most commonly a gas.