{"query": "The weight of water — pressure with depth", "count": 20, "results": [{"id": "card_oceanography_pressure", "title": "The weight of water — pressure with depth", "shelf": "codex", "surface": "secular", "snippet": "Pressure rises about one atmosphere per 10 m (10 atm at 100 m, sealed); the deep sea crushes, and depth is read as pressure.", "authority_tier": "engine_derived", "source": "Narrow Highway — oceanography", "readable": false, "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)", "readable": false, "generated": false}, {"id": "card_theory_digital_analog", "title": "Digital versus analog (why discreteness survives copying)", "shelf": "theories", "surface": "secular", "snippet": "Digital versus analog (why discreteness survives copying) — an engine domain that can touch it: computer_science. Calibration: map-only — sampling rates and bit depth are ordinary arithmetic, and THIS", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_photographic_exposure_theory", "title": "Photographic exposure theory (exposure value, reciprocity)", "shelf": "theories", "surface": "secular", "snippet": "Photographic exposure theory (exposure value, reciprocity) — an engine domain that can touch it: photography. Calibration: seals — exposure values and equivalent settings compute. Three controls set h", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_depth_of_field", "title": "Depth of field & hyperfocal distance", "shelf": "theories", "surface": "secular", "snippet": "Depth of field & hyperfocal distance — an engine domain that can touch it: photography. Calibration: seals — a deterministic verifier can CONFIRM or BREAK checkable claims drawn from it, and seal them", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (lone-domain seeding)", "readable": false, "generated": false}, {"id": "card_n_bd0baa002443", "title": "Psalm 148 — Psalm 148", "shelf": "codex", "surface": "witness", "snippet": "Praise Yah! Praise Yahweh from the heavens! Praise him in the heights! Praise him, all his angels! Praise him, all his army! Praise him, sun and moon! Praise him, all you shining stars! Praise him, yo", "authority_tier": "scripture", "source": "Psalm 148", "readable": false, "generated": false}, {"id": "card_n_0f20463b9e0f", "title": "The Pressure Architecture — Core Philosophy", "shelf": "domains", "surface": "secular", "snippet": "Ruthless efficiency.\nBeauty and coherence.\nDepth demonstrated through simplicity.\nTruth survives pressure.\nDo not lie to yourself.\nForce asymmetrical advantage and use it to its fullest.\nContinuous pr", "authority_tier": "matt", "source": "The Pressure Architecture — Matt Harris", "readable": false, "generated": false}, {"id": "card_bridge_theory_depth_of_field__wave_optics", "title": "Bridge: Depth of field & hyperfocal distance  ↔  Wave optics (Huygens, Snell's law, diffraction)", "shelf": "bridges", "surface": "secular", "snippet": "Depth of field & hyperfocal distance and Wave optics (Huygens, Snell's law, diffraction) are the same form in different domains. focus and the circle of confusion are optics — the lens equation on a s", "authority_tier": "reference", "source": "The Bridges — cross-domain isomorphisms", "readable": false, "generated": false}, {"id": "card_power_batteries", "title": "Batteries — the store, and how not to wreck it", "shelf": "energy", "surface": "secular", "snippet": "The battery is your reservoir. LEAD-ACID (flooded/AGM) is cheap but heavy, and you must not regularly drain it below ~50% or it dies young — so a 100 Ah lead-acid battery gives ~50 Ah of usable energy", "authority_tier": "reference", "source": "U.S. Department of Energy / NREL consumer energy guidance (public domain)", "readable": false, "generated": false}, {"id": "card_water_wells", "title": "Protecting a well or spring", "shelf": "water", "surface": "secular", "snippet": "A well or spring is a lasting source if you keep surface filth out of it. Cap and cover it, build the ground up so rain runs AWAY from it, and keep livestock, latrines, and fuel well uphill and at lea", "authority_tier": "reference", "source": "U.S. EPA drinking-water guidance (public domain)", "readable": false, "generated": false}, {"id": "card_n_483afbd6f648", "title": "Psalm 106 — Psalm 106", "shelf": "codex", "surface": "witness", "snippet": "Praise Yahweh! Give thanks to Yahweh, for he is good, for his loving kindness endures forever. Who can utter the mighty acts of Yahweh, or fully declare all his praise? Blessed are those who keep just", "authority_tier": "scripture", "source": "Psalm 106", "readable": false, "generated": false}, {"id": "card_floor_oceanography", "title": "Oceanography — the salt sea in motion", "shelf": "codex", "surface": "secular", "snippet": "Pressure rises with depth; seawater is 3.5 percent salt; density differences drive the thermohaline conveyor. Three pillars rest on earth science (the basins), chemistry (dissolved salts) and thermody", "authority_tier": "engine_derived", "source": "Narrow Highway — oceanography", "readable": false, "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", "readable": false, "generated": false}, {"id": "card_works_manning", "title": "How fast water runs in an open channel", "shelf": "the-works", "surface": "secular", "snippet": "Manning's equation gives the velocity of water in a channel from its roughness, depth and slope — here 3.33 m/s. It sizes culverts, canals and storm drains.  Worked & sealed by the engine — V = (1/0.0", "authority_tier": "verified", "source": "The Works — worked & sealed", "readable": false, "generated": false}, {"id": "card_src_openstax_college_physics_2e_11_4_variation_of_pressure_with_depth_in_5f0b0e0e", "title": "11.4 Variation of Pressure with Depth in a Fluid — College Physics 2e", "shelf": "physics", "surface": "secular", "snippet": "11.4\n\nVariation of Pressure with Depth in a Fluid\n\nLearning Objectives\n\nBy the end of this section, you will be able to:\n\nDefine pressure in terms of weight.\n\nExplain the variation of pressure with de", "authority_tier": "reference", "source": "OpenStax: College Physics 2e (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_college_physics_ap_courses_11_4_variation_of_pressure_with_depth_in_ba447b72", "title": "11.4 Variation of Pressure with Depth in a Fluid — College Physics for AP® Courses", "shelf": "physics", "surface": "secular", "snippet": "11.4\n\nVariation of Pressure with Depth in a Fluid\n\nLearning Objectives\n\nBy the end of this section, you will be able to:\n\nDefine pressure in terms of weight.\n\nExplain the variation of pressure with de", "authority_tier": "reference", "source": "OpenStax: College Physics for AP® Courses (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_college_physics_ap_courses_2e_11_4_variation_of_pressure_with_depth_in_5f0b0e0e", "title": "11.4 Variation of Pressure with Depth in a Fluid — College Physics for AP® Courses 2e", "shelf": "physics", "surface": "secular", "snippet": "11.4\n\nVariation of Pressure with Depth in a Fluid\n\nLearning Objectives\n\nBy the end of this section, you will be able to:\n\nDefine pressure in terms of weight.\n\nExplain the variation of pressure with de", "authority_tier": "reference", "source": "OpenStax: College Physics for AP® Courses 2e (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_college_physics_11_4_variation_of_pressure_with_depth_in_5f0b0e0e", "title": "11.4 Variation of Pressure with Depth in a Fluid — College Physics", "shelf": "physics", "surface": "secular", "snippet": "11.4\n\nVariation of Pressure with Depth in a Fluid\n\nIf your ears have ever popped on a plane flight or ached during a deep dive in a swimming pool, you have experienced the effect of depth on pressure ", "authority_tier": "reference", "source": "OpenStax: College Physics (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_university_physics_volume_1_additional_problems_44752bad", "title": "Additional Problems — University Physics Volume 1", "shelf": "physics", "surface": "secular", "snippet": "Additional Problems\n\n104.\n\nBefore digital storage devices, such as the memory in your cell phone, music was stored on vinyl disks with grooves with varying depths cut into the disk. A phonograph used ", "authority_tier": "reference", "source": "OpenStax: University Physics Volume 1 (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_university_physics_volume_1_key_terms_b9903fdf", "title": "Key Terms — University Physics Volume 1", "shelf": "physics", "surface": "secular", "snippet": "Key Terms\n\nabsolute pressure\nsum of gauge pressure and atmospheric pressure\n\nArchimedes’ principle\nbuoyant force on an object equals the weight of the fluid it displaces\n\nBernoulli’s equation\nequation", "authority_tier": "reference", "source": "OpenStax: University Physics Volume 1 (CC-BY 4.0)", "readable": false, "generated": false}], "house": {"door": "FIND", "kind": "cards", "trail": "results", "seal": null, "next_step": {"do": "open the top card", "door": "FIND", "tool": "card_get", "params": {"id": "card_oceanography_pressure"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}