• 5

PHYSICAL CONSTANTS (cgs)7

Physical Quantity

Symbol

Value

Units

Boltzmann constant

k

1.3807

X

10"

16

erg/deg (K)

Elementary charge

e

4.8032

X

10"

10

statcoulomb

 

 

 

 

 

 

(statcoul)

Electron mass

me

9.1094

X

10"

28

g

Proton mass

mp

1.6726

X

10"

24

g

Gravitational constant

G

6.6726

X

10"

8

dyne-cm2/g2

Planck constant

h

6.6261

X

10"

27

erg-sec

 

H = h/2tt

1.0546

X

10"

27

erg-sec

Speed of light in vacuum

c

2.9979

X

1010

cm/sec

Proton/electron mass

mp/me

1.8362

X

103

 

 

ratio

 

 

 

 

 

 

Electron charge/mass

e/me

5.2728

X

1017

statcoul/g

ratio

 

 

 

 

 

 

 

2tr2me4

 

 

 

 

 

Rydberg constant

" ch*

1.0974

X

105

 

cm"1

Bohr radius

ao = h2/me2

5.2918

X

10"

9

cm

Atomic cross section

ivao2

8.7974

X

10"

17

cm2

Classical electron radius

2 / 2 re = e /me

2.8179

X

10"

13

cm

Thomson cross section

(8tt/3 )re2

6.6525

X

10"

25

cm2

Compton wavelength of

h/mec

2.4263

X

10"

10

cm

electron

h/mec

3.8616

X

10"

11

cm

Fine-structure constant

a = e2/he

7.2974

X

10"

3

 

 

a-1

137.04

 

 

First radiation constant

c\ — 27vhc2

3.7418 X

10"

5

erg-cm2/sec

Second radiation

C2 = he/k

1.4388

 

cm-deg (K)

constant

 

 

 

 

 

 

Stefan-Boltzmann

<j

5.6705 X

10"

5

erg/cm2-

constant

 

 

 

 

 

sec-deg4

Wavelength associated

Ao

1.2398 X

10"

4

cm

with 1 eV

 

 

 

 

 

 

Physical Quantity

Symbol

Value

Units

 

Frequency associated

"0

 

2.4180 X

1014

Hz

 

with 1 eV

 

 

 

 

 

 

Wave number associated

k0

 

8.0655 X

103

cm-1

 

with 1 eV

 

 

 

 

 

 

Energy associated with

 

 

1.6022 x

io-12

erg

 

1 eV

 

 

 

 

 

 

Energy associated with

 

 

1.9864 x

10-16

erg

 

1 cm-1

 

 

 

 

 

 

Energy associated with

 

 

13.606

eV

 

1 Rydberg

 

 

 

 

 

 

Energy associated with

 

 

8.6174 x

10~5

eV

 

1 deg Kelvin

 

 

 

 

 

 

Temperature associated

 

 

1.1604 x

104

deg (K)

 

with 1 eV

 

 

 

 

 

 

Avogadro number

Na

 

6.0221 x

1023

mol-1

 

Faraday constant

F =

NAe

2.8925 X

1014

statcoul/mol

 

Gas constant

R =

NAk

8.3145 X

107

erg/deg-mol

 

Loschmidt's number

n0

 

2.6868 X

1019

cm

 

(no. density at STP)

 

 

 

 

 

 

Atomic mass unit

mu

 

1.6605 X

io-24

g

 

Standard temperature

T0

 

273.

15

deg (K)

 

Atmospheric pressure

Po =

nokTo

1.0133 X

106

dyne/cm2

 

Pressure of 1 mm Hg

 

 

1.3332 x

103

dyne/cm2

 

(1 torr)

 

 

 

 

 

 

Molar volume at STP

V0 =

RTo/po

2.2414 x

104

3

cm

 

Molar weight of air

Mair

 

28.971

g

 

calorie (cal)

 

 

4.1868 X

107

erg

 

Gravitational

9

 

980.67

cm/sec2

 

acceleration

 

 

 

 

 

 

Авторы: 1379 А Б В Г Д Е З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Э Ю Я

Книги: 1908 А Б В Г Д Е З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Э Ю Я