Chapter E: E Euler's Formula

E

e

logarithmic constant equals 2.7182818285

Earth

density =

5.522 g/cm 3	345 lb/ft 3
5522 kg/m 3

diameter =

4.186 E + 07 ft	7928.7 m
12,760 km

mass =

• 6.019 E + 24 kg

• 1.327 E + 25 lb

volume =

• 3.85 E + 22 ft ³

• 1.09 E + 21 m ³

eddy current

efficiency (eff) = actual/theoretical = output/input

efficiency, percent	= 100 (efficiency in decimals)
	= 100 (actual/theoretical)
	= 100 (output/input)

See also ELECTROMAGNETISM.

elastic limit

See also STRENGTH OF MATERIALS.

ELECTRICAL

where

a	= electrical resistivity coefficient for temperature correction for a material, per/ F
A	= cross-sectional area, in. 2
AC	= alternating current
B	= angle, degree
C	= capacitance, farads
C 1, C 2, C 3	= individual capacitance, farads
C F	= capacitance of cable, microfarads/ft
C M	= capacitance of cable, microfarads/mi
C T	= total capacitance, farads
cm	= area of conductor, cmil
d	= length of conductor, ft
d 1	= length of circuit, one way, ft
D	= diameter of conductor, in.
D C	= outside diameter of cable insulation, in.
D W	= diameter of wire, in.
DC	= direct current
E	= potential, volts
E AO, E BO, E CO	= phase to common potential, volts
E P	= transformer primary winding potential, volts
E S	= transformer secondary winding potential, volts
eff	= efficiency, decimal
emf	=...