When do liquids exert a pressure

The depth of water near lowermost tube is the greatest so the water comes out of lowermost tube with the greatest pressure and goes farthest from the vessel. As the depth of water increases the pressure of water gradually increases. The greater the depth of a point in a liquid, the greater is the pressure.

Liquids also exert pressure on the walls of the vessel in which they are stored. The sideways pressure exerted by liquids also increases with the depth of the liquid. The sideways pressure of a liquid on walls of a vessel is almost zero at its surface. As the depth of liquid increases the sideways pressure on the walls of the vessel gradually increases and it becomes maximum near the bottom of the vessel.

The wall of a dam is made thicker at the bottom so as to tolerate very high sideways pressure exerted by deep water stored in the reservoir of dam. Activity : Liquid exert pressure on the bottom of its container which depends on the height of its column. Take a transparent plastic pipe. Also take a thin sheet of a rubber. Stretch the thin rubber sheet and tie it tightly over one end of the plastic pipe. The plastic pipe is the container which has stretchable bottom made of a thin rubber sheet.

We will find that on pouring water in the pipe ,the rubber sheets tied to its bottom stretches and bulges out. The bulging out of rubber sheet demonstrates that the water poured in pipe exerts a pressure on the bottom of its container. This is because the bottom of container is made of a flexible, thin rubber sheet which can get stretched by the pressure exerted by water to form a buldge. Now pour some water in the plastic pipe so that height of water column in the pipe increases.

As the height of water column increases the bulge in the rubber sheet also increases showing that the pressure of water on the bottom of its container has increased. Greater the height of water column in the pipe greater will be the bulge in its rubber sheet bottom. Activity: A liquid exerts pressure on the walls of its container.

Take a plastic bottle. Fix a small glass tube above the bottom of the plastic bottle. We should seal the joint of glass tube with plastic bottle by using molten wax so that water does not leak from the joint. Tie a thin sheet of rubber tightly on the open end of glass tube. Now fill half of plastic bottle with water. On filling water, the rubber sheet tied to the mouth of glass tube gets stretched and bulges out.

This is the reason water pressure increases with depth. The pressure depends only upon the depth, and is the same anywhere at a given depth and in every direction. Why pressure is always perpendicular to a surface?

The force exerted on the end of the tank is perpendicular to its inside surface. This direction is because the force is exerted by a static or stationary fluid. The forces due to pressure have well-defined directions: they are always exerted perpendicular to any surface.

Do solids have pressure? For most solids this pressure is very low, but some notable exceptions are naphthalene, dry ice the vapor pressure of dry ice is 5. All solid materials have a vapor pressure. Why is water pressure equal in all directions?

The forces, acting over the object's surface, exert pressure on the object. Is water pressure and air pressure the same? The difference is that water is an incompressible fluid — its density is almost constant as the pressure changes — while air is a compressible fluid — its density changes with pressure. Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere a compressible fluid above it. How can you say pressure is same in all directions?

Pascal's law states that the pressure of a gas or liquid exerts force equally in all directions against the walls of its container. The force is measured in terms of force per unit area pounds per square inch—psi. This law is for liquids and gases at rest and neglects the weight of the gas or liquid. Why pressure is a scalar quantity?

Pressure is a scalar quantity. While force is a vector and pressure is derived from Force, it is still a scalar. The reason for this is that pressure always acts perpendicular to the surface it acts upon. If you pop a small hole in the side of the bin, the balls won't flow out, they're jammed.

Even in zero gravity fluids will exert an equal pressure on all walls. In zero gravity the balls would continue to remain stationary without exerting any force on the surroundings. So just thinking in terms of basketballs isn't enough.

The best answer I can give is extends on what knzhou said, liquids do not have a preferred direction. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why do liquids exert pressure on the sides of a container?

Ask Question. Asked 5 years, 6 months ago. Active 7 months ago. Viewed 8k times. Improve this question. BoddTaxter BoddTaxter 2, 2 2 gold badges 21 21 silver badges 35 35 bronze badges. Add a comment. Active Oldest Votes.