{"query": "How fast a 100-metre ocean swell travels", "count": 20, "results": [{"id": "card_works_wave_speed", "title": "How fast a 100-metre ocean swell travels", "shelf": "the-works", "surface": "secular", "snippet": "In deep water a wave's speed grows with its wavelength: c = √(gλ/2π). A 100 m swell moves at about 12.5 m/s — long waves outrun short ones and arrive first.  Worked & sealed by the engine — c = √(9.81", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_theory_physical_oceanography", "title": "Physical oceanography (hydrostatics, tides)", "shelf": "theories", "surface": "secular", "snippet": "Physical oceanography (hydrostatics, tides) — an engine domain that can touch it: oceanography. Calibration: seals — pressure with depth and tidal periods compute. Pressure rises about one atmosphere ", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_src_book_1287", "title": "The Poems of Goethe, Translated in the Original Metres — Johann Wolfgang von Goethe", "shelf": "gutenberg", "surface": "secular", "snippet": "The Poems of Goethe, Translated in the Original Metres, by Johann Wolfgang von Goethe. Subjects: German poetry -- Translations into English; Goethe, Johann Wolfgang von, 1749-1832 -- Translations into", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_book_69177", "title": "Mirth and metre — Frank E. (Frank Edward) Smedley", "shelf": "gutenberg", "surface": "secular", "snippet": "Mirth and metre, by Frank E. (Frank Edward) Smedley. Subjects: English wit and humor; Humorous poetry, English; Legends -- Poetry. Read the full text (public domain): https://www.gutenberg.org/ebooks/", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_word_metre", "title": "metre", "shelf": "dictionary", "surface": "secular", "snippet": "metre: (noun) the basic unit of length adopted under the Systeme International d'Unites (approximately 1.094 yards) — syn: meter, m · (noun) (prosody) the accent in a metrical foot of verse — syn: met", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_book_18867", "title": "The Poems and Fragments of Catullus Translated in the Metres of the Original — Gaius Valerius, 84? BCE-54 BCE Catullus", "shelf": "gutenberg", "surface": "secular", "snippet": "The Poems and Fragments of Catullus Translated in the Metres of the Original, by Gaius Valerius, 84? BCE-54 BCE Catullus. Subjects: Rome -- Poetry; Catullus, Gaius Valerius -- Translations into Englis", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_lex_g3354", "title": "G3354 — μετρέω (metreō): to measure", "shelf": "lexicon", "surface": "secular", "snippet": "μετρέω (metreō), Strong's G3354: to measure. μετρέω , -ῶ (μέτρον), [in LXX: Exo.16:18 , Num.35:5 , Rut.3:15 , Isa.40:12 , (מָדַד), Da Th Dan.5:26 (מָדַד), Wis.4:8 * ;] __1. to measure, of space, numbe", "authority_tier": "reference", "source": "STEPBible TBESH/TBESG — Extended Strong's lexicon (CC-BY, Tyndale House)", "generated": false}, {"id": "card_works_constant_c", "title": "The speed of light is a defined exact number", "shelf": "the-works", "surface": "secular", "snippet": "Since 1983 the metre is defined so that light travels 299,792,458 metres per second exactly — a constant of nature promoted to a fixed integer.  Worked & sealed by the engine — c = 299,792,458 m/s (ex", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_src_book_14591", "title": "Faust [part 1]. Translated Into English in the Original Metres — Johann Wolfgang von Goethe", "shelf": "gutenberg", "surface": "secular", "snippet": "Faust [part 1]. Translated Into English in the Original Metres, by Johann Wolfgang von Goethe. Subjects: German poetry -- Translations into English; Legends -- Germany -- Drama; Faust, -approximately ", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_book_52882", "title": "The poems of Heine; Complete Translated into the original metres; with a sketch of his life — Heinrich Heine", "shelf": "gutenberg", "surface": "secular", "snippet": "The poems of Heine; Complete Translated into the original metres; with a sketch of his life, by Heinrich Heine. Subjects: German poetry -- Translations into English; Heine, Heinrich, 1797-1856 -- Tran", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_book_25588", "title": "Outline of the development of the internal commerce of the United States 1789-1900 — Thurman William Van Metre", "shelf": "gutenberg", "surface": "secular", "snippet": "Outline of the development of the internal commerce of the United States 1789-1900, by Thurman William Van Metre. Subjects: United States -- Commerce -- History. Read the full text (public domain): ht", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_book_13211", "title": "The Pearl A Middle English Poem, A Modern Version in the Metre of the Original — Sophie Jewett", "shelf": "gutenberg", "surface": "secular", "snippet": "The Pearl A Middle English Poem, A Modern Version in the Metre of the Original, by Sophie Jewett. Subjects: Christian poetry, English (Middle) -- Translations into English. Read the full text (public ", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_comms_antenna_basics", "title": "Antennas — the cheapest way to double your range", "shelf": "communications", "surface": "secular", "snippet": "A better antenna beats more power almost every time. Key ideas: HEIGHT wins for VHF/UHF — they go line-of-sight, so raising the antenna a few metres can double reach. Length matters: a common field an", "authority_tier": "reference", "source": "U.S. Army field antenna & signaling references (public domain)", "generated": false}, {"id": "card_src_book_7321", "title": "The Nibelungenlied Translated into Rhymed English Verse in the Metre of the Original — G. H. (George Henry), 1866-1962 [Translator] Needler", "shelf": "gutenberg", "surface": "secular", "snippet": "The Nibelungenlied Translated into Rhymed English Verse in the Metre of the Original, by G. H. (George Henry), 1866-1962 [Translator] Needler. Subjects: Epic poetry, German -- Translations into Englis", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_word_square_metre", "title": "square metre", "shelf": "dictionary", "surface": "secular", "snippet": "square metre: (noun) a centare is 1/100th of an are — syn: square meter, centare", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_cubic_metre", "title": "cubic metre", "shelf": "dictionary", "surface": "secular", "snippet": "cubic metre: (noun) a metric unit of volume or capacity equal to 1000 liters — syn: kiloliter, kilolitre, cubic meter", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_works_acoustics", "title": "The wave equation for sound", "shelf": "the-works", "surface": "secular", "snippet": "For any wave, speed = frequency × wavelength. A 343 Hz tone with a one-metre wavelength travels at 343 m/s — the speed of sound in air.  Worked & sealed by the engine — c = f·λ = 343·1 = 343 m/s.  [HO", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_n_6ebf8ba5db2d", "title": "Augustine, Confessions §aug_conf_03_014: These things I then knew not, nor observed; they struck my sight on all sides...", "shelf": "classics", "surface": "witness", "snippet": "These things I then knew not, nor observed; they struck my sight on all sides, and I saw them not. I indited verses, in which I might not place every foot every where, but differently in different met", "authority_tier": "father", "source": "Augustine, Confessions (c. AD 400)", "generated": false}, {"id": "card_works_concrete", "title": "The concrete for a slab", "shelf": "the-works", "surface": "secular", "snippet": "A slab 5 m by 4 m and 10 cm deep needs exactly 2 cubic metres of concrete — length × width × depth, the estimate every pour begins with.  Worked & sealed by the engine — V = 5·4·0.1 = 2 m³.  [HOLDS; o", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_src_pron_metres", "title": "metres", "shelf": "pronunciation", "surface": "secular", "snippet": "", "authority_tier": "", "source": "", "generated": false}]}