Feynman sprinkler problem
E1165
The Feynman sprinkler problem is a famous physics thought experiment that examines how a submerged, water-aspirating sprinkler would move, highlighting subtleties in fluid dynamics and momentum conservation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Feynman sprinkler problem canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T26904 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Feynman sprinkler problem Context triple: [Richard Feynman, notableIdea, Feynman sprinkler problem]
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A.
Oppenheimer–Snyder model
The Oppenheimer–Snyder model is a pioneering theoretical description of gravitational collapse in general relativity, providing one of the first rigorous treatments of how a massive star can form a black hole.
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B.
Differential analyzer
The Differential Analyzer is an early analog mechanical computer designed to solve differential equations using interconnected rotating shafts and wheels.
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C.
Cloud Gate
Cloud Gate is a famous stainless-steel public sculpture by artist Anish Kapoor, known for its reflective, bean-like shape and prominence in Chicago’s Millennium Park.
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D.
Nash embedding theorem
The Nash embedding theorem is a fundamental result in differential geometry that shows any Riemannian manifold can be isometrically embedded into some Euclidean space, thereby realizing abstract curved spaces as concrete subsets of standard Euclidean space.
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E.
Oppenheimer–Phillips process
The Oppenheimer–Phillips process is a nuclear reaction mechanism in which a deuteron interacting with a target nucleus effectively transfers its neutron while the proton is repelled, enabling certain reactions to occur at lower energies than would otherwise be required.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Feynman sprinkler problem Target entity description: The Feynman sprinkler problem is a famous physics thought experiment that examines how a submerged, water-aspirating sprinkler would move, highlighting subtleties in fluid dynamics and momentum conservation.
-
A.
Oppenheimer–Snyder model
The Oppenheimer–Snyder model is a pioneering theoretical description of gravitational collapse in general relativity, providing one of the first rigorous treatments of how a massive star can form a black hole.
-
B.
Differential analyzer
The Differential Analyzer is an early analog mechanical computer designed to solve differential equations using interconnected rotating shafts and wheels.
-
C.
Cloud Gate
Cloud Gate is a famous stainless-steel public sculpture by artist Anish Kapoor, known for its reflective, bean-like shape and prominence in Chicago’s Millennium Park.
-
D.
Nash embedding theorem
The Nash embedding theorem is a fundamental result in differential geometry that shows any Riemannian manifold can be isometrically embedded into some Euclidean space, thereby realizing abstract curved spaces as concrete subsets of standard Euclidean space.
-
E.
Oppenheimer–Phillips process
The Oppenheimer–Phillips process is a nuclear reaction mechanism in which a deuteron interacting with a target nucleus effectively transfers its neutron while the proton is repelled, enabling certain reactions to occur at lower energies than would otherwise be required.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
fluid dynamics problem
ⓘ
momentum conservation paradox ⓘ physics thought experiment ⓘ |
| asksQuestion |
Does a water-aspirating sprinkler rotate at all in steady state?
ⓘ
How do ideal-fluid predictions differ from real-fluid behavior? ⓘ How do pressure and momentum flux balance in an aspirating sprinkler? ⓘ In which direction does the sprinkler rotate when it sucks in water? ⓘ What is the role of transient start-up effects in the sprinkler’s motion? ⓘ |
| associatedWithField |
classical mechanics
ⓘ
continuum mechanics ⓘ hydrodynamics ⓘ physics education ⓘ |
| associatedWithInstitution | Los Alamos Laboratory ⓘ |
| associatedWithPerson | Richard Feynman ⓘ |
| hasAspect |
experimental verification challenges
ⓘ
idealized analysis with inviscid, incompressible fluid ⓘ realistic analysis including viscosity and turbulence ⓘ steady-state behavior ⓘ transient start-up motion ⓘ |
| hasMainTopic |
behavior of a submerged sprinkler that sucks in water
ⓘ
difference between ideal and real fluid behavior ⓘ direction of motion of a water-aspirating sprinkler ⓘ energy dissipation in real fluids ⓘ impulse delivered by fluid jets ⓘ interpretation of Newton’s third law in fluid systems ⓘ misleading naive momentum arguments ⓘ momentum conservation in fluids ⓘ pressure forces in incompressible fluids ⓘ role of viscosity in fluid motion ⓘ subtleties of fluid dynamics ⓘ transient versus steady-state flow ⓘ |
| involvesObject |
fluid reservoir
ⓘ
inflowing water jet ⓘ pivoted sprinkler head ⓘ sprinkler with curved arms ⓘ submerged rotary lawn sprinkler ⓘ |
| knownFor |
being difficult to analyze quantitatively
ⓘ
demonstrating difference between intuition and rigorous analysis ⓘ generating debate among physicists ⓘ highlighting importance of boundary conditions in fluid flow ⓘ illustrating pitfalls of oversimplified momentum arguments ⓘ |
| relatedConcept |
Bernoulli’s principle
ⓘ
Navier–Stokes equations ⓘ impulse-momentum theorem ⓘ momentum flux in fluid jets ⓘ paradoxes in classical physics ⓘ rocket propulsion by reaction forces ⓘ |
| usedIn |
popular science discussions of Feynman’s work
ⓘ
undergraduate physics teaching ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Feynman sprinkler problem Description of subject: The Feynman sprinkler problem is a famous physics thought experiment that examines how a submerged, water-aspirating sprinkler would move, highlighting subtleties in fluid dynamics and momentum conservation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.