General

A

Cross sectional area

[in. ²]

[mm ²], [m ²]

V

Volume

[in. ³]

[mm ³], [m ³]

D

Diameter

[in.], [ft]

[mm], [cm], [m]

f

Frequency

[1/sec], [1/s], [Hz]

[1/sec], [1/s], [Hz]

k

Thermal conductivity

[BTU/hr/ft ²/ F/in.]

[W/(m- K)]

l

Length

[in.], [ft]

[mm], [cm], [m]

m

Mass

[lb], [oz]

[g], [kg]

P

Pressure

[lb/in. ²], [psi]

[MPa], [N/mm ²]

r

Radius

[in.], [ft]

[mm], [cm], [m]

t

Time

[sec], [s], [min], [hr]

[sec], [s], [min], [hr]

v

Velocity

[in./sec], [ft/min]

[m/sec], [mm/min]

?

Coefficient thermal expansion

[in./in./ F 10 ^-6]

[m/m/ C 10 ^-6]

?

Specific volume

[in. ³/lb]

[cm ³/g]

?

Density specific weight

[lb/in. ³]

[g/cm ³]

? _e

Electrical volume resistivity

[ ?.cm]

[ ?.cm]

Thermal

T

Temperature

[ F]

[ C], [K]

T _O

Reference temperature

[ F]

[ C], [K]

T _M

Melt temperature

[ F]

[ C], [K]

T _E

Environmental temperature

[ F]

[ C], [K]

?T

Differential temperature

[ F]

[ C], [K]

T _G

Glass transition temperature

[ F]

[ C], [K]

T _m

Melting temperature

[ F]

[ C], [K]

T _C

Crystallization temperature

[ F]

[ C], [K]

K

Degree of crystallinity

[%], [ ]

[%], [ ]

L _k

Crystalline region of folding

[nm]

[nm]

L _a

Amorphous regions of folding

[nm]

[nm]

M _n

No. average molecular weight

[g/mol]

[g/mol]

M _w

Mass average molecular weight

[g/mol]

[g/mol]

E _R

Crack energy (rupture)

[BTU], [ft/lb], [W- sec]

[J],...