Environmental Engineering Reference
In-Depth Information
The data in Tables A.3- A.6 were taken from [1].
Ta b l e A . 3
Conversion factors in formulas used in general physics involving atomic particles.
Number
Formula
C
Units
C
p
ε
10
7
cm/s
in eV,
m
in emu
a
1
v
D
/
m
5.931
ε
10
6
cm/s
in eV,
m
in amu
b
1.389
ε
10
5
cm/s
5.506
ε
in K,
m
in emu
10
4
cm/s
1.289
ε
in K,
m
in amu
C
p
T
/
m
10
6
cm/s
2
v
D
1.567
T
in eV,
m
in amu
10
4
cm/s
1.455
ε
in K,
m
in amu
2
10
12
K
3
ε
D
C
v
3.299
v
in cm/s,
m
in emu
10
9
K
6.014
v
in cm/s,
m
in amu
10
16
eV
in cm/s,
m
in emu
2.843
v
10
13
eV
in cm/s,
m
in amu
5.182
v
10
7
s
1
4
ω
D
CH
/
m
1.759
H
in G,
m
in emu
H
9655 s
1
H
in G,
m
in amu
C
p
ε
5
r
H
D
m
/
H
3.372 cm
ε
in eV,
m
in emu,
H
in G
143.9 cm
ε
in eV,
m
in amu,
H
in G
10
2
cm
3.128
ε
in K,
m
in emu,
H
in G
1.336 cm
ε
in K,
m
in amu,
H
in G
CH
2
10
3
Pa
6
p
D
4.000
D
H
in G
0.04 erg/cm
3
1/3
in g/cm
3
7
r
W
D
Cm
/
0.7346 Å
m
in
m
a
,
C
(
r
/
r
W
)
3
n
D
4.189
r
and
r
W
in Å
Cr
2
W
p
T
/
m
10
12
cm
3
/s
8
k
0
D
4.5714
r
W
in Å,
T
in K,
m
in amu
r
0
/
in g/cm
3
,
in 10
5
g/(cms)
9
v
D
C
η
0.2179 cm/s
r
0
in
μ
m,
η
Cr
0
/
in g/cm
3
,
v
D
η
0.01178 cm/s
r
0
in
μ
m,
η
for air at
p
D
1atm,
T
D
300 K
10
28
g).
a
emu is the electron mass unit (
m
e
D
9.108
b
amu is the atomic mass unit (
m
a
D
1.6605
10
24
g).
1 The particle velocity is
v
D
p
2
ε
/
m
,
where
ε
is the energy and
m
is the particle mass.
v
D
p
8
T
/(
2 The average particle velocity is
m
) with a Maxwell distribution function for velocities
of particles;
T
is the temperature expressed in energy units and
m
is the particle mass.
3 The particle energy is
π
2
/2, where
m
is the particle mass and
ε
D
m
is the particle velocity.
v
v
4TheL rm requen ys
ω
D
eH
/(
mc
) for a charged particle of mass
m
in a magnetic field of a
H
strength
H
.
5 The Larmor radius of a charged particle is
r
H
D
p
2
/
m
/
ε
ω
H
,where
ε
is the energy of a charged
H
is the Larmor frequency.
6 The magnetic pressure (4.162),
p
m
particle,
m
is its mass, and
ω
).
7 The Wigner-Seitz radius (2.17) and the number of atoms in a cluster (2.16).
8 The reduced rate constant for atom attachment to a cluster according to (2.19).
9 The free-fall velocity for a cluster of radius
r
that is given by
D
H
2
/(8
π
gr
2
/(9
v
D
2
η
), where
g
is the
free-fall acceleration,
is the cluster density, and
η
is the viscosity of matter through which a
cluster moves.
