Name: zetlab
Telephone: +7 495-739-39-19

For user’s convenience Formula program contains a set of mathematical and physical constants.

The table below lists the values of the constants:

Menu item	Name	Value	Meas. unit
Server time (time)	server time	ZET-server time	s
Start time (starttime)	Formula program start time	–	s
Gravitational constant (g)	gravitational constant	6,67×10^-11	m³/(kg·s²)
Elementary charge (e)	elementary charge	1,602×10^-19	coulombs
Boltzmann constant (K)	Boltzmann constant	1,380×10^-23	J/K
Mass of the electron (me)	electron mass	9,10938291(40)×10^-31	kg
Mass of the proton (mp)	proton mass	1,672621777(74)×10^-27	kg
Mass of the neutron (mn)	neutron mass	1,674927351(74)×10^-27	kg
Velocity of light in vacuum (c)	velocity of light in vacuum	299 792 458	m/s
Gas constant (R)	gas constant	8,314	J/(K·mol)
Base of natural logarithm (exp)	Euler constant	2,718…
pi	pi character	3,14

The constants in formula line are displayed in angular brackets and are highlighted with purple color.

Constants