$$\rightleftharpoonup{xx}$$
$$\longleftharp{xx}$$,
$$\longrightharp{xx}$$,
Have you ever wondered why squeezing a juice box too hard makes the juice shoot out of the straw? The answer comes from Pascal’s Law.
Pascal’s Law says that when pressure is applied to a fluid in a closed container, that pressure spreads out equally in all directions.
So, when you squeeze one side of the juice box, the pressure doesn’t just stay there—it spreads through the juice in every direction. Since the straw is the easiest way out, the juice shoots up through it.
The same thing happens with an air-filled balloon. When you press one side, the air inside pushes back equally, making the balloon bulge or feel tighter.
You’ve seen it in a tube of toothpaste or in a syringe. When you press the bottom, the pressure moves through the fluid and pushes it out through the top opening.
Whether it’s juice, air, or toothpaste, you're pressing in just one place—but the fluid pressure spreads equally in all directions.
