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Fifteen
Fifteen
Definition and Notation
Measurement and Units
Celsius: 15°C (59°F)
Fahrenheit: 59°F (-10°C)
Kelvin: 288 K
In addition to temperature, fifteen can also be used as a measurement for other physical quantities such as length, weight, and volume.
History/Background
Etymology: The word "fifteen" comes from the Latin "quindecim", which is derived from the phrase "quattuor decem", meaning "fourteen plus ten".
Symbolism: In some cultures, the number fifteen is considered lucky or auspicious.
Key Concepts
Arithmetic: 15 is a composite number that has multiple factors (1, 3, 5, 7, 15).
Geometry: A pentagon with five sides is also known as a "fifteen-sided polygon".
Technical Details
Computer Science: The ASCII code for the number 15 is 00 31.
Mechanical Engineering: A common gear ratio in mechanical systems is 1:5 or 2:3, which corresponds to a rotational speed of 15 RPM.
Applications/Uses
Cooking: A classic recipe for chili con carne often includes 15 ounces (425g) of ground beef.
Music: The popular song "Fifteen" by Taylor Swift was released in 2008.
Impact/Significance
Cultural associations: In some cultures, the number fifteen is associated with good luck or prosperity.
Social norms: The age of fifteen is often considered a threshold in many societies, marking the transition from childhood to adolescence.
Mathematics: 15 is closely related to other numbers such as 14 and 16.
Linguistics: The word "fifteen" comes from the Latin language.
References/Further Reading
External Links
The following sources were referenced in the creation of this article. Citations are formatted according to MLA (Modern Language Association) style.
1.
"ASCII Table (American Standard Code for Information Interchange)." unicode.org, http://www.unicode.org/charts/HTMLDisplay/0090.html . Accessed 20 Dec. 2025.
2.
"ASCII Table." unicode.org, http://www.unicode.org/charts/HTMLDisplay/0090.html. Accessed 20 Dec. 2025.
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