Dimensionless quantity · Quantity with no physical dimension · YYNN

Dimensionless quantity

Y 83%

Quantity with no physical dimension

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Influencing rating

Y 83%

Fraction of the sky obscured by clouds when observed from a particular location

Mathematical constant

Fixed number that has received a name

Energy conversion efficiency

Ratio between the useful output and the input of a machine

Hamming distance

Number of bits that differ between two strings

Academic Freedom Index

index number (scaled 0–1), and near-global dataset on several dimensions of academic freedom in different countries, published by Global Public Policy Institute since 2020 (index structure described in 2017)

Number of disease cases in a given population at a specific time

Return on investment

Ratio between net income and investment

Leaf area index

Dimensionless quantity that characterizes plant canopies

Number of times a given event occurs per photon absorbed by a quantum system

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