All Questions
Tagged with classical-mechanics pressure
15
questions
16
votes
8
answers
3k
views
Can a ship float in a (big) bathtub?
I am confused.
Some sources say it is possible at least theoretically ( http://www.wiskit.com/marilyn/battleship.jpeg ) and some say it is not true ( http://blog.knowinghumans.net/2012/09/a-...
- 263
6
votes
4
answers
36k
views
Physics of the inverted bottle dispenser
When you invert a water-bottle in a container, the water rises and then stops at a particular level --- as soon as it touches the hole of the inverted bottle. This will happen no matter how long your ...
- 1,283
1
vote
1
answer
2k
views
Determining the components of the force on a curved surface due to pressure
I have a cross section of a half-tube with a pressure gradient across it causing a force outwards. I am attempting to extract the vertical component (in relation to diagram) of the force on this semi-...
- 113
5
votes
2
answers
256
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Help me understand extreme pressure
So we have the tragedy of the submersible being lost near the Titanic site.
I am trying to understand the pressure the vessel was under. I have heard the "$1$ atmosphere for every $10$ meters&...
- 153
2
votes
3
answers
617
views
Is there any direction of pressure i.e. according to force applied or something..?
I was reading about pressure in general and came to know that it is a scalar and being scalar it has no direction(by definition of scalars).
But I think that there is some direction as when we push a ...
- 564
28
votes
6
answers
56k
views
Why does my door shut faster when the window is open?
I've noticed that if I shut my door when the window is open in a room, the door will tend to shut faster. If I shut the door when the window is closed with a normal force it will not fully close as if ...
- 431
14
votes
2
answers
3k
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How to model/simulate pressures and flows in a network of pipes
I'm having a hard time finding information on how to model/simulate this. I attached a couple files, both of which show an example tank & pump network. It's just nonsense that I made up for this ...
- 151
9
votes
3
answers
19k
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Why should fluids be confined for Pascal's Law to be applicable
When is Pascal's law about fluid pressure propagation applicable? Is
it applicable to a closed circular pipe with a pump rotating the
fluid, but not to a tub of water. Most statements require only ...
- 3,798
4
votes
2
answers
7k
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Concept of surface tension: excess pressure inside an air bubble in a tank of water
I know the expression for excess pressure inside a LIQUID DROP is :
$$
P_2 - P_1 = 2S/R
$$
where $P_2$ is the pressure just inside the liquid drop and $P_1$ is the pressure outside the liquid drop ...
- 329
3
votes
4
answers
2k
views
Pressure inside when a container is closed
Let us suppose that there is a container with its lid open sitting at the bottom of an ocean. The pressure at the bottom of the container will depend on the water column above it assuming only static ...
- 163
2
votes
2
answers
321
views
Air Pressure Acting Below Object
Consider an object resting on a surface. If I had to find the net force on the object, I would write an equation as follows: weight = normal force.
But what about the air pressure that's acting on the ...
- 251
2
votes
2
answers
1k
views
How will hovercraft work on Mars?
The facts are:
On Mars atmosphere pressure is way much lower than on Earth.
To hover hovercraft blows air under itself to create air cushion. This air cushion as I understand must have enough ...
- 23
1
vote
3
answers
1k
views
Flow of pressure in water bottle
Say you would have a plastic bottle partially containing water that is laying on its side. How would applying external pressure through a weight on the side affect the internal pressure. In other ...
- 19
1
vote
2
answers
3k
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What causes the balloon to pop when we push with needle onto it's surface?
I am a bit puzzled because I can see two possible reasons, first one is more common and the other one makes sense too, so here they go:
1) balloon pops because of the fact that after pressure is ...
- 383
1
vote
2
answers
209
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How is pressure affected by horizontal force in fluid?
In the situation shown above, Point A is just near the wall at negligible distance. But how is pressure at A is due to weight of water and atmospheric pressure only,why does it not have any pressure ...
- 111