t_P
E176978
t_P denotes the Planck time, the fundamental unit of time in physics derived from universal constants and representing the shortest meaningful interval in current physical theories.
All labels observed (1)
| Label | Occurrences |
|---|---|
| t_P canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1564804 — 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: t_P Context triple: [Planck time, symbol, t_P]
-
A.
the T
The T is the public transit system serving the Greater Boston area, operated by the Massachusetts Bay Transportation Authority.
-
B.
PT
PT is the time standard used along the west coast of North America, including cities like Los Angeles, San Francisco, and Vancouver.
-
C.
PT
PT is the two-letter ISO 3166-1 alpha-2 country code that uniquely identifies Portugal in international standards and systems.
-
D.
TPA
TPA is an abbreviation commonly used for a Tri-Party Agreement, a legal contract involving three separate parties that defines their respective rights and obligations.
-
E.
TPA
TPA is the three-letter IATA airport code for Tampa International Airport, a major commercial airport serving the Tampa Bay area in Florida, USA.
- 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: t_P Target entity description: t_P denotes the Planck time, the fundamental unit of time in physics derived from universal constants and representing the shortest meaningful interval in current physical theories.
-
A.
the T
The T is the public transit system serving the Greater Boston area, operated by the Massachusetts Bay Transportation Authority.
-
B.
PT
PT is the time standard used along the west coast of North America, including cities like Los Angeles, San Francisco, and Vancouver.
-
C.
PT
PT is the two-letter ISO 3166-1 alpha-2 country code that uniquely identifies Portugal in international standards and systems.
-
D.
TPA
TPA is an abbreviation commonly used for a Tri-Party Agreement, a legal contract involving three separate parties that defines their respective rights and obligations.
-
E.
TPA
TPA is the three-letter IATA airport code for Tampa International Airport, a major commercial airport serving the Tampa Bay area in Florida, USA.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Planck unit
ⓘ
fundamental unit of time ⓘ physical constant ⓘ |
| alsoKnownAs | Planck time ⓘ |
| appearsIn |
cosmology of the very early universe
ⓘ
discussions of the Big Bang singularity ⓘ |
| belongsTo | Planck units ⓘ |
| belongsToCategory |
constants of nature
ⓘ
natural units ⓘ |
| conceptualRole | sets natural time scale where quantum effects of gravity become strong ⓘ |
| definedBy |
Planck units
ⓘ
surface form:
Max Planck units system
|
| hasApproximateValue |
5.39 × 10^-44 seconds
ⓘ
5.391247e-44 s ⓘ |
| hasDimension | time ⓘ |
| hasLog10ValueInSeconds | approximately -43.27 ⓘ |
| hasSIUnit | second ⓘ |
| isAssociatedWith |
Planck energy
ⓘ
Planck length ⓘ Planck mass ⓘ Planck temperature ⓘ |
| isDefinedAs | sqrt(ħ G / c^5) ⓘ |
| isDefinedInTermsOf | ħ = h / (2π) ⓘ |
| isDerivedFrom |
Newtonian gravitational constant G
ⓘ
surface form:
gravitational constant G
reduced Planck constant ⓘ
surface form:
reduced Planck constant ħ
speed of light in vacuum c ⓘ |
| isFundamentalIn | Planck scale definitions ⓘ |
| isInverselyProportionalTo |
c^(5/2)
ⓘ
sqrt(1/ħ) ⓘ |
| isMuchSmallerThan |
atomic timescales
ⓘ
nuclear timescales ⓘ timescales of particle interactions ⓘ |
| isNotDirectlyMeasurableWith | current experimental technology ⓘ |
| isPartOf | Planck unit system based on c, ħ, G, k_B ⓘ |
| isProportionalTo | sqrt(G) ⓘ |
| isSmallestMeaningfulTimeScaleIn |
Planck scale physics
ⓘ
quantum gravity theories ⓘ |
| namedAfter | Max Planck ⓘ |
| orderOfMagnitude | 10^-44 seconds ⓘ |
| relevance | marks boundary where classical concepts of time may break down ⓘ |
| symbolFor | Planck time ⓘ |
| usedAsNaturalUnitIn |
loop quantum gravity
ⓘ
quantum gravity ⓘ string theory ⓘ theoretical physics ⓘ |
| usedFor |
non-dimensionalization of physical equations
ⓘ
scaling arguments in high-energy physics ⓘ |
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: t_P Description of subject: t_P denotes the Planck time, the fundamental unit of time in physics derived from universal constants and representing the shortest meaningful interval in current physical theories.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.