Water Pressure and Equilibrium in Underwater Cylinders

In summary, the conversation discusses the concept of an empty cylinder being pushed down 100 meters in the ocean and filled with water, as well as the addition of a bucket into the cylinder and whether the water pressure at 100 meters would push the bucket up. The conclusion is that the bucket would be pushed up to the same level as the ocean surface, approximately 100 meters, due to the pressure of the water.
  • #1
gloo
261
2
theoritically, if an empty cylinder (say 2 meters diameter) was pushed down 100 meters in the ocean and held there in equilibrium (not moving up or down), and the bottom was cut out, the water would rush up to fill the cylinder to a the same level as the ocean surface. What if there was a bucket of water that was just slightly smaller than the 2 meter diameter of the cylinder (so the water in the cylnder will not escape through over the bucket) lowered into the bottom (100 meters down), and the bottom was removed. Would the pressure of water at 100 meters push the bucket up?? How tall would the bucket have to be (filled with water), to stop the water pressure from pushing the bucket up?

thanks
 
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  • #2
What would be your guess?
 
  • #3
meaning that the bucket is in the cylinder? and the bucket is "open ended"?
 
  • #4
Yes open at the top to the air.
 
  • #5
Well, what do you think the answer is? From your first post, I think you could hazard a guess. If the ocean could support a column of water 100 m tall, would it really matter that the water is contained in a bucket? (Assuming we can ignore the weight of the bucket itself.)
 
  • #6
well Doc, i guess you are saying the bucket will be 100 meters.
 
  • #7
Yep. Does that make sense to you?
 
  • #8
yes, thanks your time.
 

Related to Water Pressure and Equilibrium in Underwater Cylinders

What is directional water pressure?

Directional water pressure refers to the force exerted by water in a specific direction, typically perpendicular to the surface it is in contact with. This force is caused by the weight of the water above and is affected by factors such as depth, density, and movement of the water.

How does directional water pressure affect structures?

Directional water pressure can put a significant amount of stress on structures, especially ones that are submerged or in contact with water. It can cause erosion, displacement, and even structural failure if not properly accounted for in the design and construction process.

What is the difference between hydrostatic and hydrodynamic pressure?

Hydrostatic pressure refers to the force exerted by stationary water, such as in a container or pool, while hydrodynamic pressure refers to the force exerted by moving water, such as in a river or ocean. Both types of pressure are affected by the direction and speed of the water flow.

How can directional water pressure be measured?

Directional water pressure can be measured using instruments such as pressure gauges, manometers, or pressure transducers. These devices can be attached to structures or submerged in water to accurately measure the force being exerted in a specific direction.

How can directional water pressure be controlled or mitigated?

Directional water pressure can be controlled or mitigated through various methods such as reinforcing structures with stronger materials, incorporating drainage systems to redirect water flow, and using barriers or dams to reduce the force of the water. Proper planning and engineering techniques can also help to account for directional water pressure in the design of structures.

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