liquid
Let an agent explain the liquid state and its properties, distinguish liquids from other states and from fluids in general, support questions on measuring and handling liquids, and support learning.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What a liquid is.
Properties
Properties.
Properties
Properties.
- What defines the liquid state, and what are viscosity, surface tension, density and vapour pressure? definition
- How do liquids differ from gases, solids and fluids in general? definition
Molecular
Molecular picture.
Molecular
Molecular.
- How do intermolecular forces explain liquid behaviour and phase transitions? definition
- Which entry fits phase transitions? action
Measure Measuring liquids.
Volume
Volume and density.
Volume
Volume.
- How are liquid volume, density and viscosity measured, and which units apply? provenance
- Which entry fits liquid units? action
Flow
Flow and pumping.
Flow
Flow.
- How do liquids flow in pipes, and how are they pumped and metered? definition
- Which entry fits fluid mechanics? action
Handle Handling and safety.
Safety
Hazardous liquids.
Safety
Safety.
- How are flammable, toxic and cryogenic liquids stored, transported and handled safely, according to regulations? provenance
- Is a spill or exposure emergency present now? boundary
Everyday
Liquids in daily life.
Everyday
Everyday.
- How do liquid properties matter in cooking, cleaning and medicine dosing? provenance
- Which entry fits a specific liquid? action
Learn Science and teaching.
Science
Liquid science.
Science
Science.
- What are current research topics in liquids, such as supercooled liquids and liquid crystals? provenance
- Which references are standard? provenance
Teach
Teaching.
Teach
Teaching.
- How can states of matter and liquid properties be taught with experiments? action
- Which misconceptions arise? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
What it is Filled
A state of matter in which a substance flows and takes the shape of its container while keeping a nearly constant volume, with molecules close together but free to move past one another, as in water, oils, molten metals and liquid gases; liquids are characterised by viscosity, surface tension, density and vapour pressure, are studied in physics and chemistry, and are handled in everyday life, industry and medicine.
Why it exists Filled
Let an agent explain the liquid state and its properties, distinguish liquids from other states and from fluids in general, support questions on measuring and handling liquids, and support learning.
Distinguishing features Filled
- Fixed volume, variable shape
- Viscosity and surface tension
- Incompressibility
- Phase transitions
What robots and AI may and may not do Filled
Must not
- Mix unknown liquids or decant them into unlabelled containers.
- Pour flammable or toxic liquids into drains.
- Store liquids in containers that may confuse them with drinks.
- Treat a solution or slurry as a pure liquid in safety advice.
Only with a human decision
- Responding to a hazardous spill.
May
- Explain the liquid state and how liquids differ from gases and solids.
- Report spills and leaks of liquids it is authorized to monitor.
- Relay hazard information for named liquids from safety data sheets.
Moral aspects Filled
- Spills of toxic or flammable liquids harm workers and the environment.
- Children are poisoned by liquids stored in drink bottles.
Who is affected
- Workers
- Children
- Waterways
Owners Filled
Steward
Nobody owns the state of matter; the holder of a liquid answers for its storage.
Links to other meta-models Filled
parent
- Q102205 - registry parent class
related
- fluid - category
- plasma - another state of matter
- liquid unit - measuring liquid volumes
- interfacial tension - liquid-liquid interfaces
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.liquid
- Wikidata: Q11435 (https://www.wikidata.org/wiki/Q11435)
Direct properties required Filled
- Density: kg/m3 - Density is measured as mass per unit volume at a stated temperature and pressure.
- Dynamic viscosity: Pa s - Dynamic viscosity is measured with a viscometer or rheometer under stated temperature and shear conditions.
- Surface tension: N/m - Surface tension is measured by force or drop shape methods with temperature and the adjoining phase specified.
- Vapour pressure: Pa - Vapour pressure is measured as the pressure of vapour in equilibrium with the liquid at a stated temperature.
Recognition required Filled
- Flows and takes container shape
- Nearly constant volume
- Gases expand to fill; solids keep shape; fluids include both liquids and gases
- Flowing substances with a free surface.
Capabilities and actions required Filled
- explain properties
- distinguish from other states
- support measuring and handling
- support learning
Hazards and failure modes required Filled
- Spills and leaks
- Flammable and toxic liquids
- Confusing liquids with fluids or solutions
Standards and interfaces required Filled
- SI units for volume, density and viscosity
- Transport and storage rules for hazardous liquids
- Standard measurement methods
Context of use required Filled
- A state of matter that flows with fixed volume.
- water and aqueous solutions
- oils and organic liquids
- molten metals and salts
- cryogenic liquids
- non-Newtonian and complex liquids
Sources Filled
- Wikidata item Q11435: liquid - identity and sense of the item
- Wikipedia: Liquid - general description of the item
Open questions
- Should each liquid type be a separate entry?
- How should safety data be linked?
- How should physics resources be linked?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q11435/spec.json