Questions tagged [buoyancy]
Use "buoyancy" for any question where an object is suspended or submerged in a fluid. Buoyant force is the force that acts upward on a partially or completely submerged object.
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Cheerios force, nanotechnology [closed]
So apparently , I had thought that is, can Cheerios effect used for like controlling nanobots & nanoparticles in a fluid environment?
I do not have much knowledge on this topic but I am very ...
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Does resistance on a floating object increase, the deeper I push it?
For example, if I have a balloon, and I force it underwater. Is the force required to submerge it to a depth of 1 foot, the same as the force required to push it from 1 foot deep to 2 foot deep, or ...
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How precisely does the density of an object need to match the density of water to achieve neutral buoyancy?
The classic explanation I can find online is that something is neutrally buoyant when its density equals that of the fluid it sits in. For something like a boat, it can sink and increase its submerged ...
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Air carrying almost 2 kg of lead per liter of air through water
The other day some divers and I were doing an experiment under water: attaching lead to a plastic bag that (based on print on the bag) can contain 10 liter of something, blowing air into the bag and ...
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Buoyancy as a reactive force in a Newton third law force pair
I was inspired by the question Which way does the scale tip?, so I have conducted a branch of simplified experiment. I have weighted on the scales glass of water without and with stone immersed ...
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Difference in weights between two submerged objects [duplicate]
Both the basketball and the medicine (steel) ball are the same size, which means they're displacing the same amount of water. That should mean the buoyant force is the same on both, right? But then ...
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Does the small bubble stay at the center of the water sphere or float towards the surface of the water sphere?
Assuming the International Space Station has a water sphere with a small bubble at its center, is this bubble stationary or will it float towards the surface of the water sphere?
I think that due to ...
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Confusion about the Buoyancy force
Here is the part of the textbook that led to confusion:
Question: Why do we not regard the weight of the cylinder when calculating the buoyant force? As I learned previously, there is a downward force ...
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Can ship's metacenter coordinates be calculated using weight force and buoyancy force alone?
I am coding a physical simulation software for calculating ship stability that is based on a 3D model of the hull and known forces acting on it. The two principal forces are weight and buoyancy. Each ...
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Derivation of pressure in a fluid
I have a quick conceptual question regarding derivation of pressure at a depth in a fluid. When deriving the equation, we say that the fluid is in a static condition, which I understand to mean that ...
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Why is weight of water not considered in most situations?
I did a lot of browsing and searching, to find nothing regarding this.
Assume a body submerged in water (or any liquid for that matter). When we draw the FBD, we show the buoyant force, the weight of ...
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Is there an simple derivation of the solution to the Submarine Paradox in terms of Special Relativity?
In 1989 James Supplee formulated the Relativistic Submarine Paradox.
A quick synopsis of the submarine paradox:
Consider a submarine that is neutrally buoyant when stationary relative to the water.
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Why does a pressure difference even create buoyant force?
The derivation of buoyant force seems to be a second step following the understanding of the answer to the present question. Can this be explained in some other way, why would even a pressure ...
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Is the weight of a floating body zero?
My physics book says that the apparent weight of a floating body is zero which is understandable since the buoyant force cancels out the gravitational force on the body.
However, further in the book ...
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Identify the hollow sphere without making a sound! [closed]
Recently I came across this problem,
Can we use the principle of floating and sinking here?
Both the spheres have the same mass.
So,
$\rho\cdot V=\text{constant}$
$\implies \rho \propto \frac{1}{V}$
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When a submarine blows its ballast and rises, where did the energy for the ascent come from?
Suppose a submarine fills its ballast tanks with water at the surface and in so doing becomes negatively buoyant. It sinks, presumably converting gravitational potential energy into kinetic for the ...
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Orientation of floating tetrahedron [closed]
What would be the stable floating orientation of a regular solid tetrahedron with a density close to the liquid, let's say 3/4?
Would it float with a vertex up or with a triangle base up?
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Buoyant force on a stick making an angle theta with the vessel
I was solving this question
The answer of the question uses balancing of torques.
It uses $L=0.5$m
I have problem with the fact that they have used buoyant force $F = \rho V g$. Marking the net ...
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Why the density have anything to do with initiation of subduction?
No matter wherever I read the process of subduction, I always find this one sentence which says "when the two tectonic plates collide the denser plate gets subducted under the lighter plate ...
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An object is connected to the end of a spring and is immersed in water. What are the forces acting on the object? [closed]
The actual question is
A copper piece of mass 10g is suspended by a vertical spring. The spring elongates 1 cm over it's natural length to keep the piece in equilibrium. A beaker containing water is ...
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Helium balloons losing buoyancy in cold environment
I recently conducted an experiment in the mountains (approx 1700m above sea level) using a series of large tethered helium balloons to measure windspeed at different heights.
After only a few hours, ...
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WIll bucket weigh more?
Let's say I have a bucket filled with some liquid which is not compressible. I also have an object with the same density as this liquid. Since the liquid and object have the same density. Object would ...
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Buoyant force application [closed]
An open bottle lies on a precise weighing scale. A fly then enters the bottle and flutters around in futile attempt to escape. Another fly, instead of using its wings to fly, uses a small helium ...
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What will happen if 10kg massed hydrogen ballon is released in air?
Generally, a hydrogen balloon would float when released in air, but what will happen when that hydrogen balloon has a mass of 10kg. Is it the density that decides whether an object floats in air or ...
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Would a candle in very high gravity blow itself out?
A candle creates an upward draft of hot air, without which the flame would be spherical. The buoyancy generated is proportional to the density difference as well as the strength of gravity.
Suppose a ...
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