Public evidence

electrical.volts_to_joules

Machine-checked verification for calculation version 1.2.0 · tier engine_tested

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Verification

12/12 calculation tests · Production surface contract 4/4

Golden tests 12 / 12
Boundary tests 0 / 0
Property tests 0 / 0
Production surface contract 4 / 4
Engine tested Yes
Source checked Yes
Artifact integrity PASS
Production attestation Embedded snapshot: STALE · Last attested schema matched 1.2.0 snapshot / local build · Semantic contract ✓ · Last attestation PASS · current evidence changed · re-attestation required · Public/cache ✓ · Origin ✓ · Live production status PASS (0 stale; 164 CURRENT) @ 2026-09-16T06:44:24.909Z
Semantic contract PASS
Evidence attested at 2026-09-16T06:44:24.203Z
Last production check 2026-09-16T06:44:24.203Z
Public / cache PASS
Origin PASS
Supplemental domain review Not performed
Named expert review Not performed

release artifacts aligned PASS
schema valid input executes PASS
engine success output validates schema PASS
schema rejects incomplete input PASS

Fingerprint sha256:175ba06d5729d003470fae5badae1fc316684c27b3e52df8c5f7676830bd63f0

Input schema sha256:0f0b3f5dddab328203bf44120bd3ba0659f61d56e9915d36d8e31100d2986b34 · Output schema sha256:a186863406b9c7290c635c276a3b34612abc70cb54a82c0a62308d9c67c80d4d · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: volts-to-joules
Engine: product
Engine build: 2026-09-15
Evidence core: 2026-09-15T06:31:46.555Z
Rendered: 2026-09-16T22:03:43.708Z
Last reviewed: —

Assumptions

Electrostatic potential energy relation; Q is the charge moved through V

Limitations

Cannot convert volts to joules without a charge (or equivalent)
Shares the product helper with W→J; contracts are distinct (Q vs t)

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

SI definition of the volt — 1 V = 1 J/C (energy per unit charge)
Supports: E = V × Q; V = E / Q
NIST Guide to the SI (SP 811) — Joule, volt, coulomb relationships
Supports: Coherent SI units for electrostatic energy
CODATA elementary charge — e ≈ 1.602176565×10⁻¹⁹ C (page constant)
Supports: V→J (e) and J→V (e) scale factors

Published checks

Golden, boundary, and property cases included in this evidence build.

ID	Kind	Status	Detail
`12V-5C`	golden	pass	Expected 60 · Actual 60
`12V-1C`	golden	pass	Expected 12 · Actual 12
`j-to-v`	golden	pass	Expected 12 · Actual 12
`1V-1e`	golden	pass	Expected 1.602176565e-19 · Actual 1.602176565e-19
`j-v-e-1eV`	golden	pass	Expected 1 · Actual 0.9999999970218315
`linear-2x-V`	golden	pass	Expected 120 · Actual 120
`linear-2x-Q`	golden	pass	Expected 120 · Actual 120
`soft-zero-V`	golden	pass	Expected 0 · Actual 0
`soft-zero-Q`	golden	pass	Expected 0 · Actual 0
`soft-zero-Q-reverse`	golden	pass	Expected 0 · Actual 0
`soft-zero-E-reverse`	golden	pass	Expected 0 · Actual 0
`120V-1C`	golden	pass	Expected 120 · Actual 120