Convert Apothecary Drams to Electronvolt mass
Convert Apothecary Drams (dr ap) to Electronvolt mass (eV/c²) instantly and accurately.
Conversion Formula
eV/c² = dr ap × 2.180971362e+33
About Apothecary Drams
An apothecary dram (dr ap) equals 3 scruples or 60 grains - approximately 3.888 grams. Part of the traditional apothecary system used by physicians and pharmacists from the Middle Ages through the 19th century, it was the standard unit for prescribing and dispensing medicines. Prescriptions written in the apothecary system used special symbols: the dram symbol (℈) and ounce symbol (℥) appear throughout historical medical records and old pharmacy ledgers. The apothecary dram differs from the fluid dram (a volume unit) and from the avoirdupois dram.
About Electronvolt mass
In particle physics, mass and energy are interchangeable via Einstein's E = mc². The electronvolt (eV) as a mass unit equals the mass equivalent of 1 eV of energy (approximately 1.783 × 10⁻³⁶ kg). Particle masses at the subatomic scale are routinely expressed in MeV/c² or GeV/c² - the proton mass is 938.3 MeV/c², and the electron is 0.511 MeV/c². The Higgs boson, discovered at CERN in 2012, has a mass of approximately 125.25 GeV/c². This unit is exclusively used in high-energy physics and quantum field theory, where conventional mass units like grams would require impossibly small exponents.
Quick Reference Table
| Apothecary Drams (dr ap) | Electronvolt mass (eV/c²) |
|---|---|
| 1 dr ap | 2.181 × 1033 eV/c² |
| 2 dr ap | 4.362 × 1033 eV/c² |
| 5 dr ap | 1.09 × 1034 eV/c² |
| 10 dr ap | 2.181 × 1034 eV/c² |
| 25 dr ap | 5.452 × 1034 eV/c² |
| 50 dr ap | 1.09 × 1035 eV/c² |
| 100 dr ap | 2.181 × 1035 eV/c² |