Using Constants in Math Expressions

You can use several different constants in your mathematical expressions.

Note: When you enter constants multiplied by a number, make sure to indicate the multiplication explicitly. For example, enter 2*c instead of 2c, and enter -4*iinstead of -4i.

Constant Value
C The speed of light in m/s (2.998^8)
e Euler’s number (2.718…)
g Gravity (9.80 m/s^2)
i The square root of -1
j The square root of -1
k The Boltzmann constant (~1.38^-23 in Joules/Kelvin)
pi The ratio of a circle’s circumference to its diameter (3.14159…)
q The fundamental charge (~1.602^-19 Coloumbs)
T The positive difference between 0K and 0°C (273.15)
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