{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:4IHJMYJMOPUXHLKR7UWIDXLLLS","short_pith_number":"pith:4IHJMYJM","canonical_record":{"source":{"id":"2508.02682","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ed-ph","submitted_at":"2025-07-19T22:34:43Z","cross_cats_sorted":["physics.data-an","physics.soc-ph"],"title_canon_sha256":"18caa70248ce997e249d8ff118a8215586d5daf51ac7d8562e55c502278a3f78","abstract_canon_sha256":"595ca47176b6bd3732bf743b777a80b53a8961b75c5319e3fdb1b9fa83b451e3"},"schema_version":"1.0"},"canonical_sha256":"e20e96612c73e973ad51fd2c81dd6b5c89936d0c04255d03489198aa2e247eac","source":{"kind":"arxiv","id":"2508.02682","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.02682","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"arxiv_version","alias_value":"2508.02682v1","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.02682","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"pith_short_12","alias_value":"4IHJMYJMOPUX","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"pith_short_16","alias_value":"4IHJMYJMOPUXHLKR","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"pith_short_8","alias_value":"4IHJMYJM","created_at":"2026-07-05T11:48:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:4IHJMYJMOPUXHLKR7UWIDXLLLS","target":"record","payload":{"canonical_record":{"source":{"id":"2508.02682","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ed-ph","submitted_at":"2025-07-19T22:34:43Z","cross_cats_sorted":["physics.data-an","physics.soc-ph"],"title_canon_sha256":"18caa70248ce997e249d8ff118a8215586d5daf51ac7d8562e55c502278a3f78","abstract_canon_sha256":"595ca47176b6bd3732bf743b777a80b53a8961b75c5319e3fdb1b9fa83b451e3"},"schema_version":"1.0"},"canonical_sha256":"e20e96612c73e973ad51fd2c81dd6b5c89936d0c04255d03489198aa2e247eac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:48:28.970944Z","signature_b64":"3W57wrJSScOQJ5eOcNfH4McTjK1d9gsQd5lWseWqJgVAzrXQ73d3vSP17vYLs4nBanUcyV4ekA/XtmyBxXYyAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e20e96612c73e973ad51fd2c81dd6b5c89936d0c04255d03489198aa2e247eac","last_reissued_at":"2026-07-05T11:48:28.970474Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:48:28.970474Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2508.02682","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:48:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8NhkmifpfvwCpw5T52pBIUx2ZVuScjtW+Oy+yZokjImsoRm8nrUwcZYKwOT95L/nDN8YVncdaMeVKF3feAUiCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T13:08:08.215404Z"},"content_sha256":"da4f77946ff6e28dd17e3e77a8d24728e0632db22acdf6b0ea020795bb51a350","schema_version":"1.0","event_id":"sha256:da4f77946ff6e28dd17e3e77a8d24728e0632db22acdf6b0ea020795bb51a350"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:4IHJMYJMOPUXHLKR7UWIDXLLLS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental Physics Laboratory 2: Calculating the Value of Water Density using Metal Rod and Water Container","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.data-an","physics.soc-ph"],"primary_cat":"physics.ed-ph","authors_text":"Osvaldo L. Santos-Pereira","submitted_at":"2025-07-19T22:34:43Z","abstract_excerpt":"This article presents a detailed analysis of an undergraduate physics laboratory experiment designed to determine the density of water using fundamental measurement techniques and data analysis methods. The experimental setup consists of a precision scale, a graduated container filled with water, and a suspended metal rod held by a crank, allowing for controlled displacement measurements. The primary objective of this experiment is to reinforce essential concepts in experimental physics, particularly in deriving physical models that correlate measurable quantities, performing precise measureme"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.02682","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2508.02682/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:48:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0Xnl/Vi4GZ+BQHvPcS8mHEmPdf9CDDqE/gHHSxQtIkuh6nNrP8SlK3G2rwpw7cPgvozKe/DBsshQmdcC5UjBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T13:08:08.215900Z"},"content_sha256":"8e9869b8ba0dc23e964b4a34bdde0e5a83d0a30538cfadd266cca0786dd77207","schema_version":"1.0","event_id":"sha256:8e9869b8ba0dc23e964b4a34bdde0e5a83d0a30538cfadd266cca0786dd77207"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4IHJMYJMOPUXHLKR7UWIDXLLLS/bundle.json","state_url":"https://pith.science/pith/4IHJMYJMOPUXHLKR7UWIDXLLLS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4IHJMYJMOPUXHLKR7UWIDXLLLS/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-14T13:08:08Z","links":{"resolver":"https://pith.science/pith/4IHJMYJMOPUXHLKR7UWIDXLLLS","bundle":"https://pith.science/pith/4IHJMYJMOPUXHLKR7UWIDXLLLS/bundle.json","state":"https://pith.science/pith/4IHJMYJMOPUXHLKR7UWIDXLLLS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4IHJMYJMOPUXHLKR7UWIDXLLLS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:4IHJMYJMOPUXHLKR7UWIDXLLLS","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"595ca47176b6bd3732bf743b777a80b53a8961b75c5319e3fdb1b9fa83b451e3","cross_cats_sorted":["physics.data-an","physics.soc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ed-ph","submitted_at":"2025-07-19T22:34:43Z","title_canon_sha256":"18caa70248ce997e249d8ff118a8215586d5daf51ac7d8562e55c502278a3f78"},"schema_version":"1.0","source":{"id":"2508.02682","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.02682","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"arxiv_version","alias_value":"2508.02682v1","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.02682","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"pith_short_12","alias_value":"4IHJMYJMOPUX","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"pith_short_16","alias_value":"4IHJMYJMOPUXHLKR","created_at":"2026-07-05T11:48:28Z"},{"alias_kind":"pith_short_8","alias_value":"4IHJMYJM","created_at":"2026-07-05T11:48:28Z"}],"graph_snapshots":[{"event_id":"sha256:8e9869b8ba0dc23e964b4a34bdde0e5a83d0a30538cfadd266cca0786dd77207","target":"graph","created_at":"2026-07-05T11:48:28Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2508.02682/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This article presents a detailed analysis of an undergraduate physics laboratory experiment designed to determine the density of water using fundamental measurement techniques and data analysis methods. The experimental setup consists of a precision scale, a graduated container filled with water, and a suspended metal rod held by a crank, allowing for controlled displacement measurements. The primary objective of this experiment is to reinforce essential concepts in experimental physics, particularly in deriving physical models that correlate measurable quantities, performing precise measureme","authors_text":"Osvaldo L. Santos-Pereira","cross_cats":["physics.data-an","physics.soc-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ed-ph","submitted_at":"2025-07-19T22:34:43Z","title":"Experimental Physics Laboratory 2: Calculating the Value of Water Density using Metal Rod and Water Container"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.02682","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:da4f77946ff6e28dd17e3e77a8d24728e0632db22acdf6b0ea020795bb51a350","target":"record","created_at":"2026-07-05T11:48:28Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"595ca47176b6bd3732bf743b777a80b53a8961b75c5319e3fdb1b9fa83b451e3","cross_cats_sorted":["physics.data-an","physics.soc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ed-ph","submitted_at":"2025-07-19T22:34:43Z","title_canon_sha256":"18caa70248ce997e249d8ff118a8215586d5daf51ac7d8562e55c502278a3f78"},"schema_version":"1.0","source":{"id":"2508.02682","kind":"arxiv","version":1}},"canonical_sha256":"e20e96612c73e973ad51fd2c81dd6b5c89936d0c04255d03489198aa2e247eac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e20e96612c73e973ad51fd2c81dd6b5c89936d0c04255d03489198aa2e247eac","first_computed_at":"2026-07-05T11:48:28.970474Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:48:28.970474Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3W57wrJSScOQJ5eOcNfH4McTjK1d9gsQd5lWseWqJgVAzrXQ73d3vSP17vYLs4nBanUcyV4ekA/XtmyBxXYyAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:48:28.970944Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.02682","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da4f77946ff6e28dd17e3e77a8d24728e0632db22acdf6b0ea020795bb51a350","sha256:8e9869b8ba0dc23e964b4a34bdde0e5a83d0a30538cfadd266cca0786dd77207"],"state_sha256":"28e065a6eb2edc7ee0bcd66f3f708ac213b8b47467e64aea971767103ca86619"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vq3zsl2QfsU3M4wvFysteryN+ZqPyGkUPPYAU/NAMZqoGFB6Lsyl7Br77QgPhpvsY8LI3mYK5GWt/GNehVecAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T13:08:08.220486Z","bundle_sha256":"211ce51c69691a423a36ad5d74f89a2f9dd0fd52945cbf1a95d9b3228c982e97"}}