常量 (scipy.constants )

物理和数学常数和单位。

数学常数

pi

交点

golden

黄金比率

golden_ratio

黄金比率

物理常数

c

真空中的光速

speed_of_light

真空中的光速

mu_0

磁常数 \(\mu_0\)

epsilon_0

电常数(真空介电常数)， \(\epsilon_0\)

h

普朗克常数 \(h\)

Planck

普朗克常数 \(h\)

hbar

\(\hbar = h/(2\pi)\)

G

牛顿引力常数

gravitational_constant

牛顿引力常数

g

标准重力加速度

e

基本电荷

elementary_charge

基本电荷

R

摩尔气体常数

gas_constant

摩尔气体常数

alpha

精细结构常数

fine_structure

精细结构常数

N_A

阿伏伽德罗常数

Avogadro

阿伏伽德罗常数

k

玻尔兹曼常数

Boltzmann

玻尔兹曼常数

sigma

斯特凡-玻尔兹曼常数 \(\sigma\)

Stefan_Boltzmann

斯特凡-玻尔兹曼常数 \(\sigma\)

Wien

维恩位移律常数

Rydberg

里德伯格常数

m_e

电子质量

electron_mass

电子质量

m_p

质子质量

proton_mass

质子质量

m_n

中子质量

neutron_mass

中子质量

常量数据库

除了上述变量之外， scipy.constants 还包含2018年CODATA推荐值 [CODATA2018] 包含更多物理常量的数据库。

value \(密钥)

由键索引的Physical_Constants中的值

unit \(密钥)

由键索引的Physical_Constants中的单位

precision \(密钥)

由键索引的Physical_Constants中的相对精度

find \([sub, disp] )

返回包含给定字符串的Physical_Constant键的列表。

ConstantWarning 

访问当前CODATA数据集中不再存在的常量
scipy.constants.physical_constants

物理常数字典，格式为 physical_constants[name] = (value, unit, uncertainty) 。

可用的常量：

alpha particle mass

6.64465733577e-27千克

alpha particle mass energy equivalent

5.9719201914E-10 J

alpha particle mass energy equivalent in MeV

3727.3794066兆伏

alpha particle mass in u

4.001506179127 u

alpha particle molar mass

0.0040015061777千克摩尔^-1

alpha particle relative atomic mass

4.001506179127

alpha particle-electron mass ratio

7294.29954142

alpha particle-proton mass ratio

3.97259969009

Angstrom star

1.00001495e-10米

atomic mass constant

1.6605390666e-27千克

atomic mass constant energy equivalent

1.4924180856E-10 J

atomic mass constant energy equivalent in MeV

931.49410242兆伏

atomic mass unit-electron volt relationship

931494102.42 EV

atomic mass unit-hartree relationship

34231776.874 E_h

atomic mass unit-hertz relationship

2.25234271871e+23赫兹

atomic mass unit-inverse meter relationship

751300661040000.0 m^-1

atomic mass unit-joule relationship

1.4924180856E-10 J

atomic mass unit-kelvin relationship

10809540191600.0 K

atomic mass unit-kilogram relationship

1.6605390666e-27千克

atomic unit of 1st hyperpolarizability

3.2063613061e-53 C^3 m^3 J^-2

atomic unit of 2nd hyperpolarizability

6.2353799905e-65 C^4 m^4 J^-3

atomic unit of action

1.054571817e-34焦耳

atomic unit of charge

1.602176634e-19C

atomic unit of charge density

1081202384570.0立方米^-3

atomic unit of current

0.00662361823751 A

atomic unit of electric dipole mom.

8.4783536255e-30摄氏度m

atomic unit of electric field

514220674763.0 V m^-1

atomic unit of electric field gradient

9.7173624292e+21V m^-2

atomic unit of electric polarizability

1.64877727436e-41 C^2 m^2 J^-1

atomic unit of electric potential

27.211386245988伏

atomic unit of electric quadrupole mom.

4.4865515246e-40 cm m^2

atomic unit of energy

4.3597447222071E-18 J

atomic unit of force

8.2387234983E-08北纬

atomic unit of length

5.29177210903e-11米

atomic unit of mag. dipole mom.

1.85480201566e-23 J T^-1

atomic unit of mag. flux density

235051.756758吨

atomic unit of magnetizability

7.8910366008E-29 J T^-2

atomic unit of mass

9.1093837015e-31千克

atomic unit of momentum

1.9928519141e-24 kg ms^-1

atomic unit of permittivity

1.11265005545e-10 F m^-1

atomic unit of time

2.4188843265857e-17 s

atomic unit of velocity

2187691.26364毫秒^-1

Avogadro constant

6.02214076e+23mol^-1

Bohr magneton

9.2740100783e-24 J T^-1

Bohr magneton in eV/T

5.788381806E-05 EV T^-1

Bohr magneton in Hz/T

13996244936.1 Hz T^-1

Bohr magneton in inverse meter per tesla

46.686447783 m^-1 T^-1

Bohr magneton in K/T

0.67171381563 K T^-1

Bohr radius

5.29177210903e-11米

Boltzmann constant

1.380649e-23 J K^-1

Boltzmann constant in eV/K

8.617333262e-05 EV K^-1

Boltzmann constant in Hz/K

20836619120.0 Hz K^-1

Boltzmann constant in inverse meter per kelvin

69.50348004 m^-1 K^-1

classical electron radius

2.8179403262e-15米

Compton wavelength

2.42631023867e-12米

conductance quantum

7.748091729E-05 S

conventional value of ampere-90

1.00000008887 A

conventional value of coulomb-90

1.00000008887摄氏度

conventional value of farad-90

0.9999999822华氏度

conventional value of henry-90

1.00000001779 H

conventional value of Josephson constant

483597900000000.0 Hz V^-1

conventional value of ohm-90

1.00000001779欧姆

conventional value of volt-90

1.00000010666伏

conventional value of von Klitzing constant

25812.807欧姆

conventional value of watt-90

1.00000019553瓦

Cu x unit

1.00207697e-13米

deuteron g factor

0.8574382338

deuteron mag. mom.

4.330735094e-27 J T^-1

deuteron mag. mom. to Bohr magneton ratio

0.000466975457

deuteron mag. mom. to nuclear magneton ratio

0.8574382338

deuteron mass

3.3435837724e-27千克

deuteron mass energy equivalent

3.00506323102e-10 J

deuteron mass energy equivalent in MeV

1875.61294257兆伏

deuteron mass in u

2.013553212745 u

deuteron molar mass

0.00201355321205千克摩尔^-1

deuteron relative atomic mass

2.013553212745

deuteron rms charge radius

2.12799e-15米

deuteron-electron mag. mom. ratio

-0.0004664345551

deuteron-electron mass ratio

3670.48296788

deuteron-neutron mag. mom. ratio

-0.44820653

deuteron-proton mag. mom. ratio

0.30701220939

deuteron-proton mass ratio

1.99900750139

electron charge to mass quotient

-175882001076.0摄氏度千克^-1

electron g factor

-2.00231930436256

electron gyromag. ratio

176085963023.0 s^-1 T^-1

electron gyromag. ratio in MHz/T

28024.9514242兆赫T^-1

electron mag. mom.

-9.2847647043e-24 J T^-1

electron mag. mom. anomaly

0.00115965218128

electron mag. mom. to Bohr magneton ratio

-1.00115965218128

electron mag. mom. to nuclear magneton ratio

-1838.28197188

electron mass

9.1093837015e-31千克

electron mass energy equivalent

8.1871057769E-14 J

electron mass energy equivalent in MeV

0.51099895兆伏

electron mass in u

0.000548579909065 u

electron molar mass

5.4857990888e-07 kg mol^-1

electron relative atomic mass

0.000548579909065

electron to alpha particle mass ratio

0.0001370933554787

electron to shielded helion mag. mom. ratio

864.058257

electron to shielded proton mag. mom. ratio

-658.2275971

electron volt

1.602176634E-19 J

electron volt-atomic mass unit relationship

1.07354410233e-09 u

electron volt-hartree relationship

0.036749322175655 E_h

electron volt-hertz relationship

241798924200000.0赫兹

electron volt-inverse meter relationship

806554.3937 m^-1

electron volt-joule relationship

1.602176634E-19 J

electron volt-kelvin relationship

11604.51812 K

electron volt-kilogram relationship

1.782661921e-36千克

electron-deuteron mag. mom. ratio

-2143.9234915

electron-deuteron mass ratio

0.0002724437107462

electron-helion mass ratio

0.0001819543074573

electron-muon mag. mom. ratio

206.7669883

electron-muon mass ratio

0.00483633169

electron-neutron mag. mom. ratio

960.9205

electron-neutron mass ratio

0.00054386734424

electron-proton mag. mom. ratio

-658.21068789

electron-proton mass ratio

0.000544617021487

electron-tau mass ratio

0.000287585

electron-triton mass ratio

0.0001819200062251

elementary charge

1.602176634e-19C

elementary charge over h-bar

1519267447000000.0 A J^-1

Faraday constant

96485.33212℃摩尔^-1

Fermi coupling constant

1.1663787e-05 GeV^-2

fine-structure constant

0.0072973525693

first radiation constant

3.741771852e-16宽m^2

first radiation constant for spectral radiance

1.191042972e-16 W m^2 Sr^-1

Hartree energy

4.3597447222071E-18 J

Hartree energy in eV

27.211386245988 EV

hartree-atomic mass unit relationship

2.92126232205e-08 u

hartree-electron volt relationship

27.211386245988 EV

hartree-hertz relationship

6579683920502000.0赫兹

hartree-inverse meter relationship

21947463.13632 m^-1

hartree-joule relationship

4.3597447222071E-18 J

hartree-kelvin relationship

315775.02480407 K

hartree-kilogram relationship

4.8508702095432e-35千克

helion g factor

-4.255250615

helion mag. mom.

-1.074617532e-26 J T^-1

helion mag. mom. to Bohr magneton ratio

-0.001158740958

helion mag. mom. to nuclear magneton ratio

-2.127625307

helion mass

5.0064127796e-27千克

helion mass energy equivalent

4.4995394125E-10 J

helion mass energy equivalent in MeV

2808.39160743兆伏

helion mass in u

3.014932247175 u

helion molar mass

0.00301493224613千克摩尔^-1

helion relative atomic mass

3.014932247175

helion shielding shift

5.996743e-05

helion-electron mass ratio

5495.88528007

helion-proton mass ratio

2.99315267167

hertz-atomic mass unit relationship

4.4398216652e-24 u

hertz-electron volt relationship

4.135667696e-15 EV

hertz-hartree relationship

1.519829846057e-16E_h

hertz-inverse meter relationship

3.3356409519815204e-09 m^-1

hertz-joule relationship

6.62607015E-34 J

hertz-kelvin relationship

4.799243073e-11K

hertz-kilogram relationship

7.372497323e-51千克

hyperfine transition frequency of Cs-133

9192631770.0赫兹

inverse fine-structure constant

137.035999084

inverse meter-atomic mass unit relationship

1.3310250501e-15 u

inverse meter-electron volt relationship

1.239841984E-06 EV

inverse meter-hartree relationship

4.556335252912e-08 E_h

inverse meter-hertz relationship

299792458.0赫兹

inverse meter-joule relationship

1.986445857e-25 J

inverse meter-kelvin relationship

0.01438776877 K

inverse meter-kilogram relationship

2.210219094e-42千克

inverse of conductance quantum

12906.40372欧姆

Josephson constant

483597848400000.0 Hz V^-1

joule-atomic mass unit relationship

6700535256.5 u

joule-electron volt relationship

6.241509074E+18 EV

joule-hartree relationship

2.2937122783963E+17E_h

joule-hertz relationship

1.509190179e+33 Hz

joule-inverse meter relationship

5.034116567e+24 m^-1

joule-kelvin relationship

7.242970516e+22K

joule-kilogram relationship

1.1126500560536185e-17千克

kelvin-atomic mass unit relationship

9.2510873014e-14 u

kelvin-electron volt relationship

8.617333262E-05 EV

kelvin-hartree relationship

3.1668115634556e-06 E_h

kelvin-hertz relationship

20836619120.0赫兹

kelvin-inverse meter relationship

69.50348004 m^-1

kelvin-joule relationship

1.380649e-23 J

kelvin-kilogram relationship

1.536179187e-40千克

kilogram-atomic mass unit relationship

6.0221407621e+26 u

kilogram-electron volt relationship

5.609588603e+35 EV

kilogram-hartree relationship

2.0614857887409E+34 E_h

kilogram-hertz relationship

1.356392489e+50 Hz

kilogram-inverse meter relationship

4.524438335e+41 m^-1

kilogram-joule relationship

8.987551787368176E+16 J

kilogram-kelvin relationship

6.50965726e+39K

lattice parameter of silicon

5.431020511e-10米

lattice spacing of ideal Si (220)

1.920155716e-10米

Loschmidt constant (273.15 K, 100 kPa)

2.651645804E+25 m^-3

Loschmidt constant (273.15 K, 101.325 kPa)

2.686780111e+25m^-3

luminous efficacy

683.0磅宽^-1

mag. flux quantum

2.067833848e-15宽带

Mo x unit

1.00209952e-13米

molar gas constant

8.314462618焦耳摩尔^-1K^-1

molar mass constant

0.00099999999965千克摩尔^-1

molar mass of carbon-12

0.0119999999958千克摩尔^-1

molar Planck constant

3.990312712e-10 J Hz^-1mol^-1

molar volume of ideal gas (273.15 K, 100 kPa)

0.02271095464 m^3mol^-1

molar volume of ideal gas (273.15 K, 101.325 kPa)

0.02241396954 m^3mol^-1

molar volume of silicon

1.205883199e-05 m^3mol^-1

muon Compton wavelength

1.17344411e-14米

muon g factor

-2.0023318418

muon mag. mom.

-4.4904483e-26 J T^-1

muon mag. mom. anomaly

0.00116592089

muon mag. mom. to Bohr magneton ratio

-0.00484197047

muon mag. mom. to nuclear magneton ratio

-8.89059703

muon mass

1.883531627e-28千克

muon mass energy equivalent

1.692833804e-11 J

muon mass energy equivalent in MeV

105.6583755兆伏

muon mass in u

0.1134289259 u

muon molar mass

0.0001134289259千克摩尔^-1

muon-electron mass ratio

206.768283

muon-neutron mass ratio

0.112454517

muon-proton mag. mom. ratio

-3.183345142

muon-proton mass ratio

0.1126095264

muon-tau mass ratio

0.0594635

natural unit of action

1.054571817e-34焦耳

natural unit of action in eV s

6.582119569e-16 EV s

natural unit of energy

8.1871057769E-14 J

natural unit of energy in MeV

0.51099895兆伏

natural unit of length

3.8615926796e-13米

natural unit of mass

9.1093837015e-31千克

natural unit of momentum

2.730924488e-22公斤米^-1

natural unit of momentum in MeV/c

0.5109989461 MeV/c

natural unit of time

1.28808866819e-21 s

natural unit of velocity

299792458.0毫秒^-1

neutron Compton wavelength

1.31959090581e-15米

neutron g factor

-3.82608545

neutron gyromag. ratio

183247171.0 s^-1 T^-1

neutron gyromag. ratio in MHz/T

29.1646931兆赫T^-1

neutron mag. mom.

-9.6623651e-27 J T^-1

neutron mag. mom. to Bohr magneton ratio

-0.00104187563

neutron mag. mom. to nuclear magneton ratio

-1.91304273

neutron mass

1.67492749804e-27千克

neutron mass energy equivalent

1.50534976287E-10 J

neutron mass energy equivalent in MeV

939.56542052兆伏

neutron mass in u

1.00866491595 u

neutron molar mass

0.0010086649156千克摩尔^-1

neutron relative atomic mass

1.00866491595

neutron to shielded proton mag. mom. ratio

-0.68499694

neutron-electron mag. mom. ratio

0.00104066882

neutron-electron mass ratio

1838.68366173

neutron-muon mass ratio

8.89248406

neutron-proton mag. mom. ratio

-0.68497934

neutron-proton mass difference

2.30557435e-30千克

neutron-proton mass difference energy equivalent

2.07214689E-13 J

neutron-proton mass difference energy equivalent in MeV

1.29333236兆伏

neutron-proton mass difference in u

0.00138844933 u

neutron-proton mass ratio

1.00137841931

neutron-tau mass ratio

0.528779

Newtonian constant of gravitation

6.6743e-11 m^3 kg^-1 s^-2

Newtonian constant of gravitation over h-bar c

6.70883e-39(GeV/c^2)^-2

nuclear magneton

5.0507837461e-27 J T^-1

nuclear magneton in eV/T

3.15245125844e-08 EV T^-1

nuclear magneton in inverse meter per tesla

0.0254262341353 m^-1 T^-1

nuclear magneton in K/T

0.00036582677756 K T^-1

nuclear magneton in MHz/T

7.6225932291兆赫T^-1

Planck constant

6.62607015e-34 J Hz^-1

Planck constant in eV/Hz

4.135667696e-15 eV Hz^-1

Planck length

1.616255e-35米

Planck mass

2.176434e-08千克

Planck mass energy equivalent in GeV

1.22089e+19GeV

Planck temperature

1.416784E+32K

Planck time

5.391247e-44 s

proton charge to mass quotient

95788331.56摄氏度千克^-1

proton Compton wavelength

1.32140985539e-15米

proton g factor

5.5856946893

proton gyromag. ratio

267522187.44 s^-1 T^-1

proton gyromag. ratio in MHz/T

42.577478518兆赫T^-1

proton mag. mom.

1.41060679736e-26 J T^-1

proton mag. mom. to Bohr magneton ratio

0.0015210322023

proton mag. mom. to nuclear magneton ratio

2.79284734463

proton mag. shielding correction

2.5689e-05

proton mass

1.67262192369e-27千克

proton mass energy equivalent

1.50327761598e-10 J

proton mass energy equivalent in MeV

938.27208816兆伏

proton mass in u

1.007276466621 u

proton molar mass

0.00100727646627千克摩尔^-1

proton relative atomic mass

1.007276466621

proton rms charge radius

8.414E-16米

proton-electron mass ratio

1836.15267343

proton-muon mass ratio

8.88024337

proton-neutron mag. mom. ratio

-1.45989805

proton-neutron mass ratio

0.99862347812

proton-tau mass ratio

0.528051

quantum of circulation

0.00036369475516 m^2 s^-1

quantum of circulation times 2

0.00072738951032 m^2 s^-1

reduced Compton wavelength

3.8615926796e-13米

reduced muon Compton wavelength

1.867594306e-15米

reduced neutron Compton wavelength

2.1001941552e-16米

reduced Planck constant

1.054571817e-34焦耳

reduced Planck constant in eV s

6.582119569e-16 EV s

reduced Planck constant times c in MeV fm

197.3269804 MeV调频

reduced proton Compton wavelength

2.10308910336e-16米

reduced tau Compton wavelength

1.110538e-16米

Rydberg constant

10973731.56816 m^-1

Rydberg constant times c in Hz

3289841960250800.0赫兹

Rydberg constant times hc in eV

13.605693122994 EV

Rydberg constant times hc in J

2.1798723611035E-18 J

Sackur-Tetrode constant (1 K, 100 kPa)

-1.15170753706

Sackur-Tetrode constant (1 K, 101.325 kPa)

-1.16487052358

second radiation constant

0.01438776877米K

shielded helion gyromag. ratio

203789456.9 s^-1 T^-1

shielded helion gyromag. ratio in MHz/T

32.43409942兆赫T^-1

shielded helion mag. mom.

-1.07455309e-26 J T^-1

shielded helion mag. mom. to Bohr magneton ratio

-0.001158671471

shielded helion mag. mom. to nuclear magneton ratio

-2.127497719

shielded helion to proton mag. mom. ratio

-0.7617665618

shielded helion to shielded proton mag. mom. ratio

-0.7617861313

shielded proton gyromag. ratio

267515315.1 s^-1 T^-1

shielded proton gyromag. ratio in MHz/T

42.57638474兆赫T^-1

shielded proton mag. mom.

1.41057056e-26 J T^-1

shielded proton mag. mom. to Bohr magneton ratio

0.001520993128

shielded proton mag. mom. to nuclear magneton ratio

2.792775599

shielding difference of d and p in HD

2.02e-08

shielding difference of t and p in HT

2.414e-08

speed of light in vacuum

299792458.0毫秒^-1

standard acceleration of gravity

9.80665毫秒^-2

standard atmosphere

101325.0页

standard-state pressure

100000.0页

Stefan-Boltzmann constant

5.670374419e-08 W m^-2 K^-4

tau Compton wavelength

6.97771E-16米

tau energy equivalent

1776.86兆伏

tau mass

3.16754e-27千克

tau mass energy equivalent

2.84684E-10 J

tau mass in u

1.90754 u

tau molar mass

0.00190754千克摩尔^-1

tau-electron mass ratio

3477.23

tau-muon mass ratio

16.817

tau-neutron mass ratio

1.89115

tau-proton mass ratio

1.89376

Thomson cross section

6.6524587321e-29 m^2

triton g factor

5.957924931

triton mag. mom.

1.5046095202e-26 J T^-1

triton mag. mom. to Bohr magneton ratio

0.0016223936651

triton mag. mom. to nuclear magneton ratio

2.9789624656

triton mass

5.0073567446e-27千克

triton mass energy equivalent

4.500387806E-10 J

triton mass energy equivalent in MeV

2808.92113298兆伏

triton mass in u

3.01550071621 u

triton molar mass

0.00301550071517千克摩尔^-1

triton relative atomic mass

3.01550071621

triton to proton mag. mom. ratio

1.0666399191

triton-electron mass ratio

5496.92153573

triton-proton mass ratio

2.99371703414

unified atomic mass unit

1.6605390666e-27千克

vacuum electric permittivity

8.8541878128e-12 F m^-1

vacuum mag. permeability

1.25663706212E-06 N A^-2

von Klitzing constant

25812.80745欧姆

W to Z mass ratio

0.88153

weak mixing angle

0.2229

Wien frequency displacement law constant

58789257570.0 Hz K^-1

Wien wavelength displacement law constant

0.002897771955米K

单位

SI前缀

yotta

\(10^{24}\)

zetta

\(10^{21}\)

exa

\(10^{18}\)

peta

\(10^{15}\)

tera

\(10^{12}\)

giga

\(10^{9}\)

mega

\(10^{6}\)

kilo

\(10^{3}\)

hecto

\(10^{2}\)

deka

\(10^{1}\)

deci

\(10^{-1}\)

centi

\(10^{-2}\)

milli

\(10^{-3}\)

micro

\(10^{-6}\)

nano

\(10^{-9}\)

pico

\(10^{-12}\)

femto

\(10^{-15}\)

atto

\(10^{-18}\)

zepto

\(10^{-21}\)

yocto

\(10^{-24}\)

二进制前缀

kibi

\(2^{10}\)

mebi

\(2^{20}\)

gibi

\(2^{30}\)

tebi

\(2^{40}\)

pebi

\(2^{50}\)

exbi

\(2^{60}\)

zebi

\(2^{70}\)

yobi

\(2^{80}\)

质量

gram

\(10^{{-3}}\) 千克

metric_ton

\(10^{{3}}\) 千克

grain

一粒/千克

lb

一磅拍击(千克)

pound

一磅拍击(千克)

blob

1英寸版本的辅助模块(单位为千克)(在1.0.0中添加)

slinch

1英寸版本的辅助模块(单位为千克)(在1.0.0中添加)

slug

千克为1个插件(在1.0.0中添加)

oz

1盎司/千克

ounce

1盎司/千克

stone

一石/千克

grain

一粒/千克

long_ton

一长吨，单位为千克

short_ton

一短吨/千克

troy_ounce

1金衡盎司/千克

troy_pound

一公斤特洛伊拍击

carat

1克拉/千克

m_u

原子质量常数(千克)

u

原子质量常数(千克)

atomic_mass

原子质量常数(千克)

角度

degree

度(弧度)

arcmin

弧分(弧度)

arcminute

弧分(弧度)

arcsec

弧秒(以弧度表示)

arcsecond

弧秒(以弧度表示)

时间

minute

一分钟(秒)

hour

一小时(秒)

day

几秒钟内的一天

week

几秒钟内的一周

year

一年(365天)(秒)

Julian_year

一儒略年(365.25天)(秒)

长度

inch

一英寸(米)

foot

一英尺(米)

yard

一码(米)

mile

一英里(米)

mil

一百万米

pt

1分(米)

point

1分(米)

survey_foot

一个测量英尺(以米为单位)

survey_mile

一个测量英里(以米为单位)

nautical_mile

一海里(以米为单位)

fermi

1费米(米)

angstrom

1埃(米)

micron

1微米(米)

au

以米为单位的一个天文单位

astronomical_unit

以米为单位的一个天文单位

light_year

以米为单位的一光年

parsec

以米为单位的一秒

压力

atm

标准大气(帕斯卡)

atmosphere

标准大气(帕斯卡)

bar

1巴(帕斯卡)

torr

1托尔(毫米汞柱)，单位为帕斯卡

mmHg

1托尔(毫米汞柱)，单位为帕斯卡

psi

1磅/磅(Pascals)

面积

hectare

一公顷(平方米)

acre

1英亩(平方米)

卷

liter

1升，单位为立方米

litre

1升，单位为立方米

gallon

一加仑(美国)，单位为立方米

gallon_US

一加仑(美国)，单位为立方米

gallon_imp

一加仑(英国)，单位为立方米

fluid_ounce

一液盎司(美国)，单位为立方米

fluid_ounce_US

一液盎司(美国)，单位为立方米

fluid_ounce_imp

一液盎司(英国)，单位为立方米

bbl

一桶，单位为立方米

barrel

一桶，单位为立方米

速度

kmh

公里/小时(米/秒)

mph

每小时英里数(米/秒)

mach

1马赫(约15摄氏度，1大气压)，单位为米/秒

speed_of_sound

1马赫(约15摄氏度，1大气压)，单位为米/秒

knot

1海里/秒(米/秒)

温度

zero_Celsius

开尔文的摄氏零度

degree_Fahrenheit

凯尔文的一华氏度(只有不同之处)

convert_temperature \(VAL，旧_Scale，新_Scale)

在摄氏度、开尔文、华氏和朗肯温标之间转换为另一个温标。

能量

eV

1电子伏特(焦耳)

electron_volt

1电子伏特(焦耳)

calorie

1卡路里(热化学)焦耳

calorie_th

1卡路里(热化学)焦耳

calorie_IT

1卡路里(国际蒸汽表卡路里，1956年)(焦耳)

erg

焦耳中的一个erg

Btu

一个英国热量单位(国际蒸汽表)，单位为焦耳

Btu_IT

一个英国热量单位(国际蒸汽表)，单位为焦耳

Btu_th

一英制热量单位(热化学单位)，单位为焦耳

ton_TNT

1吨TNT(焦耳)

电源

hp

1马力(瓦特)

horsepower

1马力(瓦特)

力

dyn

一达因(以牛顿为单位)

dyne

一达因(以牛顿为单位)

lbf

一个以牛顿为单位的拍击力量

pound_force

一个以牛顿为单位的拍击力量

kgf

1千克力(以牛顿为单位)

kilogram_force

1千克力(以牛顿为单位)

光学

lambda2nu \(λ_)

将波长转换为光学频率

nu2lambda \(Nu)

将光学频率转换为波长。

参考文献

CODATA2018

CODATA推荐的2018年基本物理常数的值。

https://physics.nist.gov/cuu/Constants/

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