Mass-Energy Equivalence Calculator (E=mc²) implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-224

Effect

Computation or source lookup only

Input and validation requirements

The extreme finite-looking input mass = 1e308 kg overflows the plain JavaScript arithmetic result to Infinity, so the instrument needs an explicit range check or overflow handling. A separate semantic hazard exists for negative mass defects because signed E is negative while released energy is normally reported as a positive magnitude.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "mass": 1,
    "mass_unit": "kg",
    "calculation": "rest_energy"
  },
  "expected_outputs": {
    "energy_J": 89875517873681760,
    "energy_MeV": 5.609588603804452e+29,
    "energy_kWh": 24965421631.578266
  },
  "working": "E = mc² = 1 kg × (299792458 m/s)² = 1 × 8.9875517873681764×10^16 = 8.9875517873681764×10^16 J.\\nE(MeV) = 8.9875517873681764×10^16 J ÷ 1.602176634×10^-13 J/MeV = 5.609588603804452×10^29 MeV.\\nE(kWh) = 8.9875517873681764×10^16 J ÷ 3.6×10^6 J/kWh = 2.4965421631578266×10^10 kWh = 24965421631.578266 kWh."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json