{"id": "card_floor_nuclear_physics", "kind": "note", "title": "Nuclear physics — binding, decay, and the strong force", "body": "The nucleus is held by the strong force against electric repulsion; mass converts to binding energy at 931.5 MeV/amu; unstable nuclei decay on a half-life. Pillars rest on the Standard Model (the strong force), relativity (E=mc^2) and quantum mechanics (tunnelling). The stick (stick_nuclear_physics_binding_decay_and_the_strong_force) seals the amu-to-MeV and a decay fraction (tools/seed_nuclear_physics.py).", "source": {"label": "Narrow Highway — nuclear", "url": "", "authority_tier": "engine_derived", "ref": "stick_nuclear_physics_binding_decay_and_the_strong_force"}, "shelf": "codex", "box": "nuclear", "bands": ["floor", "nuclear", "one map"], "subject": "Nuclear physics — binding, decay, and the strong force", "connections": [{"to_card_id": "card_nuclear_strong_force", "relationship": "has_part", "evidence": "a pillar (The strong force - what binds the nucleus)"}, {"to_card_id": "card_nuclear_mass_energy", "relationship": "has_part", "evidence": "a pillar (Mass is energy - the binding)"}, {"to_card_id": "card_nuclear_decay", "relationship": "has_part", "evidence": "a pillar (Decay - the half-life and tunnelling)"}, {"to_card_id": "card_k_floor_of_discovery", "relationship": "part_of", "evidence": "the nucleus on the one map, rooted in the Floor of Discovery"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.nuclear", "facets": {"subject": ["floor", "one map"]}, "presentation": {"glyph": "•", "kind_label": "nuclear", "by": "Narrow Highway — nuclear", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_nuclear_strong_force", "title": "The strong force - what binds the nucleus", "relationship": "has part", "why": "a pillar (The strong force - what binds the nucleus)", "href": "/card/card_nuclear_strong_force", "resolved": true}, {"id": "card_nuclear_mass_energy", "title": "Mass is energy - the binding", "relationship": "has part", "why": "a pillar (Mass is energy - the binding)", "href": "/card/card_nuclear_mass_energy", "resolved": true}, {"id": "card_nuclear_decay", "title": "Decay - the half-life and tunnelling", "relationship": "has part", "why": "a pillar (Decay - the half-life and tunnelling)", "href": "/card/card_nuclear_decay", "resolved": true}, {"id": "card_k_floor_of_discovery", "title": "The Floor of Discovery — one floor, and by its design the fear of God", "relationship": "part of", "why": "the nucleus on the one map, rooted in the Floor of Discovery", "href": "/card/card_k_floor_of_discovery", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_floor_nuclear_physics", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_floor_nuclear_physics"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}