Sharp EL-5250, EL-5230 operation manual Calculations Using Physical Constants

Chapter 3: Scientific Calculations

Calculations Using Physical Constants

Recall a constant by pressing @cfollowed by the number of the physical constant designated by a 2-digit number.

The recalled constant appears in the display mode selected with the designated number of decimal places.

Physical constants can be recalled in the NORMAL mode (when not set to binary, pental, octal, or hexadecimal), STAT mode, PROG mode and EQN mode.

Note: Physical constants are based either on the 2002 CODATA recom- mended values, or the 1995 Edition of the ‘Guide for the Use of the International System of Units (SI)’ released by NIST (National Institute of Standards and Technology), or on ISO specifications.

No.	Constant	Symbol	Unit
01	Speed of light in vacuum	c, c 0	m s–1
02	Newtonian constant of gravitation	G	m3 kg–1 s–2
03	Standard acceleration of gravity	gn	m s–2
04	Electron mass	me	kg
05	Proton mass	mp	kg
06	Neutron mass	mn	kg
07	Muon mass	m∝	kg
08	Atomic mass unit-kilogram relationship	lu	kg
09	Elementary charge	e	C
10	Planck constant	h	J s
11	Boltzmann constant	k	J K–1
12	Magnetic constant	∝0	N A–2
13	Electric constant	ε0	F m–1
14	Classical electron radius	re	m
15	Fine-structure constant	α
16	Bohr radius	a0	m
17	Rydberg constant	R∞	m–1
18	Magnetic flux quantum	Φ0	Wb
19	Bohr magneton	∝B	J T–1
20	Electron magnetic moment	∝e	J T–1
21	Nuclear magneton	∝N	J T–1
22	Proton magnetic moment	∝p	J T–1
23	Neutron magnetic moment	∝n	J T–1

48